228 INSECTS AFFECTING DOMES'TTIC ANIMALS. 
On Galeoscoptes carolinensis. Burnett collection. 
Approaches the Nirmus annulatus, occurring on Ceophleus pileatus, 
but lacks the annulations of the antenne. The black margin to the 
abdomen and the median bands are differently arranged. 
Nirmus tyrannus n. sp. 
Yellowish brown, with darker margin to metathorax and abdomen. 
Head conic, tapering sharply in front, but with rather broad truncate clypeus; 
antenn inserted midway, second joint about as long as third, fourth, and fifth 
together; eyes prominent; occiput emarginate; thorax short; metathorax but 
little longer than prothorax; legs long, middle and posterior cox elongate; 
abdomen narrow, enlarging posteriorly, quite uniformly yellowish brown, with 
four hairs arising from minute, clear spots near the posterior margin of segments 3, 
4,5,6,and7. Also on the same segments are hairs arising just within the margina] 
band and one or two hairs at the lateral angles; spiracles located in clear spots just 
within the marginal band; eighth segment a transverse band, including two clear 
spots from which hairs arise; ninth segment very small. 
Length, 2.6 mm. to 2.8 mm.; head, 0.7 mm.; abdomen, 1.68 mm. Width, head, 
0.54 mm.; abdomen, 0.63 mm. 
Described from two specimens (on Tyrannus) from the Burnett col- 
lection, both females. 
Nirmus cordatus n. sp. (Pl II, fig. a). 
Head cordate; abdomen ovate, tapering pretty sharply caudally. Color fulvous. 
Head regularly rounded in front; clypeal signature faint; antennze inserted in front 
of the middle, rather thick; eyes large, prominent; occiput emarginate, with black- 
ish border; temporal lobes with two hairs; prothorax short, a short hair on the 
angle; metathorax obtusely angled on the abdomen, two hairs at the lateral angle; 
legs strong, bright fulvous without bands; abdomen ovate, with transverse brown 
bands separated by clear spaces at the sutures, most distinct on the disk, a few short 
hairs at the angles of the posterior segments. 
Length, 2.44 mm.; head, 0.66 mm.; abdomen, 1.41 mm. Width, head, 0.73 mm. ; 
abdomen, 0.94 mm. 
On Limosa hemastica, Burnett collection. 
Described from a single female specimen and an immature individual. 
The species, however, seems to be a well-marked one, and it seems 
proper to give it a description. 
Nirmus marginatus n. sp. (Pl. II, fig. b). 
Head and body with a blackish margin, gula with an inverted shield-shaped 
fuscous spot. 
He.d longer than wide; clypeus broad, rounded with a wide continuous band; 
antenne with rather deep insertions; second joint about twice as long as the others, 
joints 3 to 5 with dusky annulations; occiput transverse, straight; prothorax 
short, rather deeply inserted in the head; metathorax twice the length of pro- 
thorax; posterior margin straight; lateral margin with blackish spots anteriorly and 
a larger fuscous patch posteriorly, with a prolongation inward to near the center; 
femora with a blackish dorsal spot extending into a partial annula; tibize with 
apical external spot and an internal black stripe; abdominal segments 1 to 7 with 
a black border and more or less distinct median transverse fuscous bands; eighth 
segment with a narrow fuscous band produced in front and with two clear pustules 
from which arise long slender hairs. 
Length, 2mm.; head, 0.56 mm. Width, head, 0.40 mm. ; sitlonion) 0.48 mm. 
On Ceophiocus pileatus, Burnett collection. 
