SUBORDER MALLOPHAGA. 229 
Nirmus abruptus n. sp. (PI. II, fig. c.) 
Head parabaloid, almost conical in front, with a distinct ventral furrow in front 
of mandibles, outer margin deeply infuscated, becoming darker to the base of the 
antenne; antennal pits surrounded by a broad, dark border, curved in front, 
straight behind, merging into 4 somewhat acute angle inwardly; antennz obscurely 
annulate with fuscous, deepest on fourth and fifth joints, fifth joint nearly as long 
as third and fourth together; temporal lobes margined with a narrow black stripe, 
a single hair at the outer angle; occiput straight; prothorax small; metathorax 
about as broad as head, with deep stripes set into margin and merging into a trans- 
verse stripe; posterior margin set with a row of stiff hairs; legs robust; femur and 
tibiw annulate at distal ends with fuscous and showing dorsally and ventrally deeper 
blackish spots; abdomen, with segments 1 to 7 with rather broad blackish margin 
within which the disk is light, clear, slightly yellowish and with a central row of 
transverse bands on ventral surface, those of the sixth and seventh segments merged 
together and connecting with the transverse stripe on the eighth segment, the lateral 
portions of which are curved forward; terminal segment slightly notched, a single 
series of hairs on the posterior margin of segments 5 to 8 and single hairs at the lateral 
angles on segments 3 to 7. 
Length, 1.69 mm.; head 0.39 mm.; abdomen, 1.08 mm. Width, head 0.35 mm.; 
abdomen, 0.51 mm. 
On Colinus virginianus, Burnettcollection. Described fromonemature 
ndividual, the slide also containing an immature one, which presents 
the same characteristics except in the intensity of the dark markings. 
This species is of the general aspect of ornatissimus, differing in the 
intensity of the abdominal margin and some of the head markings, and 
as it occurs on so distinct a group of birds it seems worthy of separate 
description. 
Nirmus parallelus n. sp. (PI. II, fig. d.) 
Long and slender, recalling the form of Lipeurus baculus. Head long, slightly 
conic; clypeus wide, slightly convex; antenn:e dusky at tip; forehead with a clear 
space in front of mandibles and a subquadrate clear space between the internal 
bands, but the anterior portion of clypeus dusky; orbital and temporal lobes 
strongly margined with black; prothorax quadrate, slightly narrowed in front; 
metathorax lobed at the sides; mesosternum, with central fuscous patch, emarginate 
in front, truncate behind, connected at sides with patches extending in from border; 
abdomen elongate, sides parallel, margins black; disk, with median brown patches, 
emarginate laterally, and separated at the sutures by transverse clear band; middle 
and posterior tibiw, with a dark spot nearly encircling the tip, male similar to the 
female; terminal segment of abdomen rounded and dusky; genital hooks heavy, 
incurved. 
9 Length, 2 mm.; head, 0.42 mm.; width, head, 0.25 nm.; abdomen, 0.37 mm. 
g Length, 1.74 mm.;-width, abdomen, 1.74 mm. 
On Agialitis vocifera, Burnett collection. (Description written in 
May, 1894.) 
This species is remarkably like the Lipeuri in appearance in the 
Slender body and parallel-sided abdomen and the character of the legs, 
but there is no trace of a process upon the third joint of the antenne 
or of the notch in terminal segment of male. 
Kellogg’s description of Nirmus boephilus from a female specimen 
from same host agrees quite closely in most respects, but differs in pro- 
portions of head. The types for my description being now in the Boston 
