Notes on Tabanidae (Dipt.) from Panama - IX. The Genera Stenotabanus Lutz, Lepiselaga Macquart and Related Genera

Aug 23, 2026

Study of Tabanidae diptera from Panama focusing on genus-level treatment of Stenotabanus Lutz, Lepiselaga Macquart, and related genera. The work groups five genera and discusses morphological character links among Stenotabanus, Lepiselaga, and Diachlorus, while separating Selasoma and Bolbodedymyia by fundamental differences. For Selasoma and Lepiselaga (notably L. crassipes), it provides diagnostic traits, historical synonymy, distribution, and Panama records, emphasizing range extensions and diagnostic separation from related taxa.

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IX. The Genera Stenotabanus Lutz, Lepiselaga Macquart and Related Genera

Overview of the treated genera and relationships

Genus Selasoma Macquart - notes and Selasoma tibiale

Genus Lepiselaga Macquart - characterization and Lepiselaga crassipes

NOTES ON TABANIDAE(DIPT.)FROM PANAMA # IX.THE GENERA STENOTABANUS LUTZ,LEPISELAGAMACQUART AND RELATED GENERA¹2 G.B.FATRCHILD,Junior Medical Bntomologist,Gorgas Memorial Laboratory,Panamá,R de P The group here treated includes five genera.Of these,Stenotabanus,Lepiselaga and Diachlorus appear to form a moreor less related group.Such forms as Diachlorus paradoxus Lutzshow many characters linking it with Lepiselaga,while Steno-labanus calvitizs n.sp.is also quite Lepiselaga-like in a numberof ways.Selasoma is much like a giant Lepiselaga,but thereare a number of rather fundamental characters separatingthem,while Bolbodimyia still appears to have no close relatives. Genus Selasoma Macquart 1838,Dipt.Exot,I,part 2,p.187(Type Tabarss libialis Fab.1.Surcouf,1921,Gen.Insect.,Fasc.175,Dipt.Taban.,p.45.Lutz,1913,Mem.Inst.Osw.Cruz,V,2,p.178.Enderlein,1922,Mitt.Mus.Berlin,X,2,p.346;1925,Op.cit.,Xi,2,p.352.Krober,1929,Enc.Ent.,Ser.B,II,Dipt.,V,pp.104,142.Borgmeier,1933,Rev.Ent.,III,p.301.Krober,1934,Rev.Ent.,IV,2,p.253. Three species are placed by Krober(1934)in this genus,tibiale Fab.,giganteum Lutz and nigrocaeruleum Rond.Ofthese,giganteiam seems only known from the types,whichhad no third antennal segment,and the species has not beensubsequently recognized.Nigrocceraleun has also not beentaken since described,while the original description statesthat the antennac have a long dorsal spine.I suspect,there-fore,that the species is very doubtfully assignable to Selasoma,and is more likely some species of Dicladocera,perhaps nearrizeti Surc. The genus is not very clearly related to any others,butseems nearest Lepiselaga. 290 Annals Entomological Society of America [Vol.XXXV, Selasoma tibiale Fabricius (Figs.1,la,1b) Tabanas libialis Fabricius,I805,Syst.Antl.,p.102(no sex;America merid.).Wiedemann,1821,Dipt.Exot.I,p.89;1828,Auss.Zweifl.Insekten,I,p.164(9;South Armerica). Von Roder,1892,Wien Ent.Zeit.,XI,8,p.237(早；Brazil). Selasoma tibisle Macquart,1838,Dipt.Exot.,I,2,n.188(4;au nord de lacapitainerie de Goyaz).Walker,1854,List Dipt.Brit.Mus.,Part V,Suppl.1,p.273.Kertesz,1900,Cat.Tabhan.,p.28.Strcouf and Gonzalez-Rincones,1912,Dipt.VuIn.Venezuela,II,p.36.Lutz,1913,Mem.Inst.Osw.Cruz,V, 2,p.179,P¹.13,fig.21(2;Venezuela and Brasilian states of Rio de Janciro,Sao Paulo,Minas Geraes,Goyaz,Bahia and Ceará)Ricardo,1904,Ann.Mag.Nat.Hist.,XIV,(7),p.354.Surcouf,1921,Gen.Inscct.,Fase.175,p.47,P1.2,figs.10a,105(Bresil). Krober,1929,Enc.Ent..Ser.B,II,Dipt.,V,pp.104,142;P1.1,fig.9;P¹.3,figs.48,49,62,67;P1.4,figs.94,96,97(,9;Matto Grosso,Bolivia,Argentina,Brazil);1934,Rev.Ent.,IV,2,p.253.Hadrws chalybaeun Perty,1833,Del.Anim.art.Brasil,p.183,P1.36,fig.20(Brasil).Hadres cyBNetm Walker,1848,List Dipt.Brit.Mus.V,Suppl.1,p.208.TabanS cyane Wiedeman,1828,Auss.Zweifl.Insekt.,I,p.152.Macquart, 1838,Dipt.Exot.,1,2,p.188.Walker,1848,List Dipt.Brit.Mus.V,Suppl.1,p.273. The species is easily separated from anything found inPanama by the basally black wings,shiny bluc black abdomen,swollen tibiae,and the wide,flattened nearly toothless thirdantennal segment.The capture of this species here representsa very considerable extension of the known range,but com-parison of Brazilian material with my two specimens has notrevealed any important differences. Distribution:Northern Argentina,Bolivia,Brasil,Ven-ezucla and Panama. Panama records:29,Moja Pollo,Chagres River region,Jan.19 and 31,1940. Genus Lepiselaga Macquart 1838.Dipt.Exot.,I,1,p.153.Bequaert,1924,Psyche,XXXI,1,p.26.Enderlein,1925,Mitt.Mus.Berlin,XI,2,p.342.Borgmeier,1933,Rev.Ent.,IV,2,p.252.(Type,Haemalopota crassipes Fab.,1805.) Iadrus Perty,1833,Del.Ariim.Artie.Brasil,p.183(not Hadrus Dejean,1833.Coleoptera). Lepidoselaga Osten Sacken,1876,Men.Boston Soc.Nat.Hist.,II,p.435.Lutg,1913,Mem.Inst.Osw.Cruz,V,2,p.30(uses both Lepiselagaand Lepidoselaga),Krober,1929,Enc.Ent.,Ser.B,II,Diptera,V,p.136. But three species of this well marked and strictly Neo-tropical genus are know

FAQs

Which genera are treated in this section on Tabanidae from Panama?

The section covers five genera, including Stenotabanus, Lepiselaga, Diachlorus, Selasoma, and Bolbodedymyia.

How are Selasoma and Diachlorus related to Lepiselaga and Stenotabanus?

Diachlorus paradoxus is described as linking with Lepiselaga, and Stenotabanus calvitizs is noted as Lepiselaga-like in several ways; Selasoma resembles a giant Lepiselaga but is separated by fundamental characters.

What diagnostic traits and range information are provided for Lepiselaga crassipes in Panama?

The text characterizes Lepiselaga by multiple morphological features and states that L. crassipes is the only widely occurring species reported from Panama, with emphasis on diagnostic separation and distribution context.

Aug 23, 2026

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