26 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
STENOTABANUS CRIBELLUM (Osten Sacken), new combination 
(Fig. 138, B) 
Tabanus cribellum Osten Sacken, Biologia Centrali-Americana, Insecta, Diptera, 
v. 1, pp. 52-53, pl. 1, fig. 10, 1886; Hine, Ohio Nat. 5: 236, 1904; Rowe and 
Knowlton, Canad. Ent. 67: 241, 1935. 
Diachlorus guttatulus Townsend, Kans. Acad. Sci. Trans. 13: 184-135, 1893. 
Tabanus guttatulus Townsend, Psyche 8: 147, 1897. 
Small; grayish; abdominal tergites 24 each with four round, brown spots. 
Female.——Length 11-12 mm. Eye bare or with very indistinct, short pile, 
green, with three purple bands. Frons gray, tinged with brown, three times 
as high as width at base, slightly widened above; basal callus shiny black, 
square or slightly broader than high, distinctly convex, with a depression above 
on each side of middle; median callus oblong, dull black, usually joined to basal 
callus but not reaching vertex; often similarly colored spots on each side of 
median callus and joined to it to form a trident-shaped, denuded area; vertex 
without tubercle but with a round shiny-black spot which does not touch eyes: 
subcallus yellowish gray. First antennal segment pale orange brown, with 
black hair above; basal portion of third dull brown, with a short, rounded, 
dorsal angle and no dorsal excision; annulate portion nearly black, stout, 
slightly longer than basal portion. Clypeus and genae nearly white, with 
concolorous hair. Second palpal segment rather short and stout, creamy white, 
with white and a few black hairs. Proboscis short, black. 
Mesonotum blackish brown, the mesoscutum with five slender grayish-brown 
lines; humeral and prescutal lobes reddish brown. Pleura, sternum, and coxae 
gray, with white hair. Wing hyaline, the base of vein R: with a stump running 
forward in a direction parallel with vein Rs. Femora gray, fore pair tinged 
with reddish; tibiae yellowish gray, the fore tibia slightly darker at apex; 
tarsi dark, but first segment of middle and of hind tarsus largely yellow; hair 
of femora and tibiae white. 
First tergite with sides anteriorly gray, followed by a narrow transverse line 
of brown and a narrow posterior margin of yellowish gray; second tergite yel- 
lowish gray, with a narrow, anterior, brown band and a transverse row of four 
round, brown spots; anterior band tapering laterally and with a posterior 
median notch; median spots sometimes narrowly joined to anterior band; 
remaining tergites each with an anterior transverse band and four brown spots, 
the bands diminishing posteriorly; venter gray, the last segment or two often 
brownish. ; 
Male.—Unknown. 
Cotypes.—Three females, collection unknown. 
Type locality —Presidio, Mexico. 
Distribution.—Utah to central Mexico. June 26-29 (Las Cruces, 
N. Mex.), Inthe United States National Museum, three females. 
The Genus TABANUS Linnaeus 
Tabanus Linnaeus, Systema Naturae, ed. 10, v. 1, p. 601, 1758. (Genotype, 
Tabanus bovinus Linnaeus. ) 
Neotabanus Lutz, Inst. Oswaldo Cruz em Manguinhos, p. 29, 1909. (Genotype, 
Tabanus trilineatus Latreille. ) 
Poecilosoma Lutz, Inst. Oswaldo Cruz em Manguinhos, p. 29, 1909. (Preoccupied 
by Poecilosoma Hubner.) 
Poeciloderas Lutz, Bol. Inst. Oswaldo Cruz 1: 15, 1921. (Genotype, Tabanus 
quadripunctatus Fabricius. ) 
Dasyommia Enderlein, Mitt. Zool. Mus. Berlin 10: 346, 1922. (Genotype, 
Tabanus cinctus Fabricius.) . 
Dasyphyrta Enderlein, Mitt. Zool. Mus. Berlin 10: 344, 1922. (Genotype, 
Tabanus maculipennis Macquart. ) 
Hybopelma Enderlein, Mitt. Zool. Mus. Berlin 10: 351, 1922. (Genotype, 
Tabanus quadripunctatus Fabricius.) 
Hybomitra Enderlein, Mitt. Zool. Mus. Berlin 10: 347, 1922. (Genotype, Hybo- 
mitra solox Enderlein. ) 
Straba Enderlein, Deut. Ent. Ztschr. 1928: 545. (Genotype, Tabanus sudeticus 
Zeller.) 
