ON TWO NORTH AMERICAN PHILOTARSIDS 
(PSOCOPTERA) 1 
By Edward L. Mockford 
Indianapolis, Indiana 
Until now, but a single species of Philotarsidae has been 
known from North America. 2 While collecting” at Port 
Townsend, Washington, I found a second species, in the 
genus Philotarsus, apparently new. Unfortunately, good 
specific characters of only one species, the European geno- 
type, are available to me for comparison, but the figures 
given here should be adequate for separation of the new 
species. Described early from eastern United States was 
Philotarsus maculosus (Aaron). This species cannot fit 
in Philotarsus as restricted by Badonnel (1943), but re- 
mains in this family. I therefore propose a new genus for 
it named in honor of its describer. 
Genus Aaroniella n. gen. 
Differs from Philotarsus in that (1) Rs in hind wing is 
ciliated, though sparsely, for its entire length beyond its 
separation from M, (2) sense tubercles of male paraprocts 
round; elongate in Philotarsus , (3) phallic frame of ap- 
proximately even thickness all around, not dilated anteri- 
orly, and lacking a secondary sclerite posteriorly, (4) 
lateral gonapophyses of female triangular, (5) pigmented 
areas of subgenital plate wide, (6) antennal color pattern : 
each flagellar segment is white at its apex which contrasts 
sharply with the darker remainder, (7) many of the hairs 
on the veins of the fore wing with brown spots at their 
bases. Also of probable generic value is the peculiar tip of 
the maxillary pick (see pi. 9, fig. 5), and the well-developed 
1 Published with a grant from the Museum of Comparative Zoology 
at Harvard College. 
2 When preparing this paper, I overlooked a paper by Dr. A. B. 
Gurney (Jour. Wash. Acad. Sci., 39: 56-65, 1949) in which records of 
Philotarsus flaviceps (Ste.) from Mount Desert Island, Maine, are cited. 
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