K7uih—Shiiiilinhr of Peru. 
So 
Ia'^s ochraceous, black and wliiti' ; antcrinr pair witli llic coxa- and 
femora ocl>racoouH, the tibia' blacU, with w hite hIk'I'.ii on tlie nndei' sid(' 
on the l)asal two-tliirds, tl>e tarsi entirely black; iniddlt! legs with tlu^ 
coxie blackish, femora and tibia' ocbraceous, the latter dark distally and 
with wdiitisb luster, tarsi with the first joint wdiite, black at tip, the 
second wdth pale basal ring, the last three ail black; hind legs with the 
cox!e black, femora blackish hrowm, ocbraceous at base, the tihiai 
blackish, yellowish at base, the tarsi wdth the first joint wdiite on the 
liasal half, the distal half and all of the succeeding joints black. Claw's 
long, wdth a short stout tooth near base in addition to the basal thicken¬ 
ing. Wings hyaline, the venation normal; thick veins yellowdsh brown, 
the spines and dense black setie on the costa causing it to appear nearly 
black; anal Held with strong green and red iridescence. Ilalteres wdth 
brown stem and pale yellow knob. 
Length. —Body, about 2.:i mm.; wing, 4.5 mm. 
Santa Eulalia, Peru, July 5, IHi:’), and Chosica, Peru, September, lbl3 
(C. PI. T. Towmsend); tw’o females. 
Type.—Cat. No. 19,349, U. S. Nat. I\lus. 
\'ery close to Simuliam orbitale Lutz. Differs particularly in the 
absence of vestiture from the frons and face and in the w’edge-like 
narrowdng of the frons towards the antennre. In S. orbitale, of which an 
authentic specimen kindly sent by Dr. Lutz is before me, the frons is 
broad throughout, nearly parallel-sided. 
Simulium chalcocoma new' species. 
Female.—l-iody black. IMesonotum grey-black, in certain lights velvet 
black on the disk and with three light grey longitudinal lines, the median 
line straight, narrow' and anteriorly abbreviated, the others sinuate and 
ending in large bright spots on the anterior margin; lateral margins and 
anterior angles broadly grey; vestiture of coarse and rather dense, evenly 
distributed, brassy hairs. Scutellum deep brow'u, rather narrow and 
j)rodnced to a distinct angle. Legs rather stout, black; all three pairs 
of tibife white at bases; fore tarsi all black; middle and bind tarsi with 
slightly more than the basal half of the first joint white. Claws with a 
stout tooth in addition to basal thickening. Wings hyaline; costa black, 
the otlier thick veins brown. Ilalteres w'liite. 
Length .—about 3 mm.; w'ing, 4 mm. 
Tincochcboca, Peru, 7,000 feet altitude, 10 August, 1911 (Yale Peruvian 
Plxpedition). 
Type.—C‘c\i. No. 18,350, U. 8. Nat. Mus. 
A full description of this species w'ill appear in a forthcoming report on 
the Diptera of the Yale Peruvian ICvpedition. It is included hen* for 
the sake of completeness. 
