28 Psyche L March 
Picicola orpheus (Osborn) 
Nirmus orpheus Osborn 1896, pp. 227-228. 
One slide containing two males, both of which are ap- 
parently terminating their last instar or are very recently 
adult. Dr. K. C. Emerson believes that they are possibly 
members of the genus Lagopoecus, while I believe they are 
more closely related to Picicola (as does Miss T. Clay, per- 
sonal communication). This species is particularly difficult 
to determine since Osborn’s host reference, Galeoscoptes 
carolinensis, presently Dumatella carolinensis (Linn.) is 
apparently incorrect. The genitalia certainly show affinities 
with Picicola. This species must remain an enigma until 
additional material is obtained. (MCZ 27340). 
Type host: Yet to be determined, probably a woodpecker. 
Bruelia ahruptus (Osborn) 
Nirmus abruptus Osborn, 1896, p. 229. 
One adult female and an immature in good condition 
(MCZ 27338). 
Type host: Unknown. The reference to Colinus virgini- 
anus (Linn.) is almost certainly incorrect. The louse has, 
in all probability, a passeriform host. 
Rotundiceps gen. nov. 
(Plate 3) 
The genus is described for Osborn’s Nirmus cordatus. 
It is closely related to Lunaceps, and is another example of 
ecological adaptation, Lunaceps frequenting the wings and 
back of the host while Rotundiceps is usually found about 
the head. 
Description : Head broadly rounded, slightly broader 
than long, only slightly buttressed marginally. Relatively 
strongly buttressed around the bases of the antennae and 
mandibular articulations. Signature only barely repre- 
Explanation of Plate 3 
Fig. 1. Dorso- ventral view of male Rotundiceps cordatus Osborn. 
Fig. 2. Male genitalia. 
