APR. 19, 1923 EWING: NEW GENERA AND SPECIES OF SUCKING LICE ~— 149 
Phthirpediculus propitheci, sp. nov. 
Forehead provided with posteriorly directed, spine-like tubercles both 
above and below; postantennal region of head with two small spine-like tuber- 
cles behind the insertion of each antenna. Eyes with poorly developed cor- 
neas, situated at the anterior angles of temples. Antennae longer than the 
head; first segment with four small ventral tubercles; second segment with 
one dorsal and two ventral tubercles; third segment with extended anterior 
margin, which causes antenna to become geniculate, the bend being between 
third and fourth segments; last segment with sensory pit on posterior 
margin. Thorax broadest at its posterior margin, where it joins the abdo- 
men. Each posterior angle of thorax with a conspicuous spine-like 
tubercle. Typical pleural plates of abdomen bilobed and with the contained 
stigmata near the front margin. Genital armature of male with a basal 
plate composed of two parallel chitinous rods which are united distally; 
with almost straight parameres, inwardly thickened, outwardly coming to a 
knife-edge and posteriorly each ending in a small, blunt hook; pseudopenis 
very large, consisting of a basal rod and a distally articulated chitinous 
hook; true penis anterior to pseudopenis, being a bent, chitinous tube. An- 
terior legs scarcely half as large as either of the others and each tibia with 
three ventral spines; tibial thumbs of second and third pairs of legs, each 
with a distal, stout spine. Length of female, 1.35 mm.; width of female, 
0.52 mm. Length of male, 1.23 mm.; width of male 0.45 mm. 
Type host and type locality: From a lemur, Propithecus edwardst, taken at 
Ambodiasy, eastern Madagascar. 
Type slide: Cat. No. 23762, U.S.N.M. 
Specimens as follows: Two females and one male (on type slide) from 
female skin (Cat. No. 63352, U.S.N.M.) of Propithecus edwards: taken at 
Ambodiasy, eastern Madagascar and two males from male skin (Cat. No. 
63354, U.S.N.M.) of same host, taken at same place. 
Proechinophthirus, gen. nov. 
Forehead very short, almost obliterated; temporal regions with prominent, 
long, curved setae. Thorax longer than broad; sternum wanting. Abdomen 
long and clothed with both long setae and short spines. Genital armature 
of male with broad, unforked basal plate and slightly curved, freely pro- 
jecting, unhooked parameres. First pair of legs greatly reduced, without 
tibial thumb, and in no way adapted for clasping. 
Type of genus: Echinophthirius fluctus Ferris. 
The type and only included species in this genus was described from speci- 
mens taken from an undetermined museum skin without data. In the 
United States National Museum there are several specimens taken from the 
fur seal (Callorhinus alascanus) at St. Paul Island, Alaska, by F. W. True 
and D. W. Prentiss, June 3, 1895. 
In the nonsimilarity of the legs and the presence of long setae over prac- 
tically all the body we have two good characters for differentiating this genus 
from Echinophthirius Giebel. 
