48 INSECUTOR INSCITI^ MENSTRUUS 



face and the hind tarsi have the last three joints dorsally 



white-haired. 



Tabanus hookeri, new species. 



Eyes bare in the female, hairy in the male. Abdomen dor- 

 sally with three longitudinal series of pale markings. Wings 

 clear, the posterior cells all widely open, the upper branch of 

 the third vein not appendiculate. 



Female: General color brownish gray. Frons broad, nar- 

 rowing gradually toward the antennae, yellowish gray ; frontal 

 callosity brown, roughly quadrate, as broad as high and con- 

 tiguous with eyes, a narrow connected line reaching about 

 one-third the way to occiput. Antennae bright ferruginous ; 

 first joint with the dorsal apex black and with many short 

 black hairs; third joint dorsally with a prominent but obtruse 

 basal process, its apex and the annulate part of the joint black. 

 Palpi yellowish white, with a few scattered black hairs. Face 

 and cheeks clothed with white pollen and hair. Thorax dor- 

 sally dark gray and yellowish brown, the latter color mostly 

 laterally and in two narrow subdorsal stripes ; scutellum yellow 

 brown tinged with gray ; pleurae grayish white and clothed 

 with white hair; disk of thorax and scutellum clothed with 

 white hair scales and fine black hairs. Abdomen dorsally 

 blackish brown, a median series of yellowish brown contigu- 

 ous triangular spots, narrow on anterior margins and broad- 

 ened to posterior margins ; on each side, half-way toward lat- 

 eral margins, a series of broad oblique bars of the same color, 

 touching both anterior and posterior margins of the segments, 

 but not the lateral margins ; extreme lateral margins with a 

 narrow continuous brownish yellow stripe ; the pale markings 

 are overlaid with whitish hair-scales ; venter pale ferruginous, 

 tinted with pale gray at the sides, the seventh segment with 

 short erect black bristles. Legs pale ferruginous, with pale 

 gray pruinosity and whitish down, the anterior and middle 

 coxae dark, the front tibiae blackened from just beyond the 

 middle; tarsi blackish. Wings hyaline, the stigma long and 

 brownish yellow. Halteres pale ferruginous, with creamy 

 white knobs. The eyes show traces of two transverse pur- 

 plish stripes. Length : Body, about 11 mm. ; wing 9 mm. 



