SIMULIUM. 59 



Hairs on face pale brown, on palpi brown, postocnlar cilia dark 

 brown. Pilosity on scutum regular, rather scalelike, golden yellow, 

 a few dark hairs on anterior angles and longer and more numerous 

 hairs of black-brown color on posterior fourth; pleural tuft yellow; 

 scutellum with yellow pilosity and long upright brown hairs; basal 

 fringe and surface hairs on abdomen pale yellow. Pilosity on legs 

 almost white, except on darkened portions where it is pale brown, 

 numerous long pale brown dorsal hairs on all joints, the fore tarsi 

 with paired apical hairs on joints 1 and 3, those on joint 2 not so 

 distinct; fore tarsi not thicker than mid pair, thinner than fore tibiae; 

 hind legs as in Plate V, figure 4; claws trifid. Wings and size as in 

 female. 



Redescribed from the type specimen. Las Vegas, N. Mex. (H. S. 

 Barber). There is another specimen from the same locality in the 

 collection, also taken by Mr. Barber. 



Nothing is known of the early stages of this species. 



Siniulium hunteri, new species. 



Female. — Black; frons shining black, face white-dusted. Scutum 

 three-striped, opaque; jDleurae opaque black, gray-dusted. Abdo- 

 men opaque, velvety black on basal four segments, shining black on 

 apical four. Legs black, yellow as follows: Coxse, trochanters, and 

 dorsal surface of tibiae of fore legs ; trochanters, bases of femora and 

 tibiae, and basal two-thirds of first tarsal joint of mid and hind legs; 

 basal third of second hind tarsal joint. Wings grayish, thick veins 

 brown ; halteres yellow, darkened at base of stalk. 



Frons with sides divergent, about two-thirds as wide above an- 

 tennae as at vertex, undusted, surface with yellow scale-like pilosity 

 and upright black hairs on lateral and posterior margins; face thickly 

 white-dusted, about one-fourth longer than broad, as broad as frons 

 at upper angle of eyes, surface hairs yellow, with some darker, brown 

 ones mixed : palpi black, pale-haired ; antennae black, yellowish on 

 basal two and base of third joints. Scutum gray-dusted, with irregu- 

 larl}^ arranged, golden yellow, scale-like pilosity, and with two 

 large white pollinose spots on anterior margin which are each more 

 than twice as broad anteriorly as the black space between them; 

 these spots are only visible when viewed from behind and occupy the 

 dilated anterior portions of the posteriorly narrower black stripe; 

 viewed from in front and above the dorsum of scutum has a central, 

 black, narrow stripe and two curved stripes beyond them, as well as 

 an indication of a narrow lateral stripe on each side; pleural tuft and 

 hairs on postspiracular area brownish yellow; scuteUuui with close- 

 lying yellow pilosity siiul upright black hairs. Abdominal basal scale 

 brown or black, fringe yellow ; lateral posterior margins of abdominal 



