220 INSECTS AFFECTING DOMESTIC ANIMALS. 
sixth, seventh, and touching the eighth segment, regularly rounded in front, roughly | 
excised behind; brown spots located near the margin on each segment back tothe 
eighth; those on the sixth segment form the outer portion of the genital patch, 
Length, 2 mm. 
General appearance of communis, of which it might be considered a 
variety, but it is quite distinct and constant in form of clypens and 
genital patch, and seems tooccur only on Quiscalus, its nearest ally being _ 
4 species occurring on Agelaius pheniceus. c 
From crow blackbird, collected at Ames, Iowa. | 
This is a very common species on this host, and I have noted it in | 
various collections. | 
Docophorus agelaii n. sp. 
Similar to quiscali, but slightly narrower. The clypeus truncate or slightly _ 
rounded, the sides sloping; trabecule curved on front margin, straight behind; the — | 
apex somewhat acuminate; bands on the abdomen broad, much incised at insertions 
of the hairs; band on the eighth segment contracting in the middle, almost broken. 
Beneath, the genital patch large, strongly curved in front, deeply and irregularly 
incised behind; Jateral spots small, rather elongated, oblique. Quite close to quiscali, 
and both might be considered varieties of communis, but seem well established. | 
Docophorus sialii n. sp. | 
Clypeus tapering, lateral angles rounded, front convex, or very slightly incurved _ 
at extreme apex; no transparent portion in front of the chitinous bars; trabeculz 
strongly curved in front, slightly curved behind, acuminate at tip. | 
On Sialia sialis, Merriam Coll. Belongs to communis group, but — 
separated by head characters. 
Docophorus corvi n. sp. | 
Whitish, with black and fuscous bands and stripes. 
Length of body, 2.5 mm.; head, 0.75 mm.; abdomen, 1.17 mm. Width of head, 
0.70 mm.; abdomen, 0.98 mm. | 
Head scarcely longer than wide, truncate in front; clypeus broad; clypeal signature 
acuminate and elongate posteriorly; posterior part black; anterior portion witha 
broad fuscous margin; antennal bands deep fuscous; 
trabecul strong, convex in front, slightly concave — 
behind, blackish band at base extending along posterior 
border ; antennz rather slender, basal joint largest, with | 
a black band extending nearly around, deepest in front; — 
second joint slender, long, mostly black, with a deep — 
incision of the black portion toward the tip, joints 3, 
4, and 5 nearly equal, black, distal joint scarcely as | 
dark as the others; eyes prominent; temporal lobes 4 
clear, with black border, in which are three clear _ 
spaces, from which hairs arise; occipital bands very | 
black; occiput slightly sinuous. Prothorax narrow, 
with broad, black margin; metathorax nearly twice as 
wide as prothorax, lateral angles rounded, deeply mar- 
gined, with black extending medially and nearly unit- | 
ing; each side set with about eight hairs arising from 
a 
round, clear pustules. Legs banded and striped with — 
Fic. 142.— Docophorus corvi—_ lack; abdomen oval, with broad fuscous marginal — 
Dees Ce bands extending well upon the disk; the posterior — 
margin set with hairs which arise from circular pustules near the margin and ;| 
from notches in the band on the disk; large, clear, circular spots marking posi- — 
tion of spiracles; eighth segment with a broad band extending clear across; ninth 
segment with two triangular patches approximate anteriorly; lateral angles with — 
| 
