30 
Psyche 
[March 
sented by small irregular sclerotized area. Posterior margin 
of head armed with short, stout setae. Rounded, lightly 
sclerotized gular area. Posterior margin of pterothorax 
with complete although irregular row of long setae. Ab- 
domen slightly longer than broad, slightly sclerotized with- 
out obvious delineation of tergites and sternites. Spiracles 
six, on morphological segments 3-8. Mid-dorsal and mid- 
ventral double rows of setae on proximal seven segments. 
All spiracles except first and last with long seta posterior 
to each on border of tergite. In male, the first six tergites 
narrowed medially, with seventh separated into two parts, 
the eighth complete. Male genital opening dorso-terminal. 
Genotype : Nirmus cordatus Osborn. 
Type host: Limosa fedoa (Linn.), the Marbled Godwit. 
Although Osborn lists L. haemastica as the host in his text, 
I have failed to find any specimens in many collections 
from this bird. Collections from L. fedoa however contain 
abundant specimens of this louse. The type slide (MCZ 
27337) label lists the host as Limosa hudsonica. 
Rhynonirmus infuscatus (Osborn) 
Lipeurus infuscatus Osborn, 1896, pp. 234-235. 
The type material consists of three slides as follows: No. 
340 with an adult female Lunaceps; No. 314 with an adult 
female Rhynonirmus; and No. 334 with two adult males, 
Rhynonirmus , from Bartramia longicauda (Bechstein). 
The male specimen centrally located in slide No. 334 is 
hereby designated as the lectotype (MCZ 27343). 
Type host: Bartram'a longicauda , the Upland Plover. 
The louse has been taken commonly from his host. Con- 
trarywise, I failed to locate it in several collections from 
Philohela minor (Gmelin). 
