288 
Psyche 
[Vol. 90 
Orthoperus scutellaris LeConte 
(Figs. 1,2) 
There are two apparent taxa of Orthoperus found in wrack at 
Odiorne Point. These run to Orthoperus s. scutellaris LeConte and 
Orthoperus s. piceus Casey in the last revision of the family (Casey 
1900). I have not been able to separate these two taxa when examin- 
ing specimens mounted on slides. Both forms are represented in the 
type series of LeConte for scutellaris at the Museum of Comparative 
Zoology. 
Their collection in the same habitat at the same time indicates 
that the differences observed may be no more than normal variation 
within the species. All of the reared adults were assignable to the 
nominate subspecies. 
Last instar larva: length 1. 5-2.0 mm. Body elongate, slightly flat- 
tened dorso-ventrally, white with grey or brown patches in dorsal 
view. Head slightly declined, two stemmata to each side, setae acic- 
ulate, frontal arms of epicranial suture widely V-shaped, epicranial 
stem absent, gular sutures distinct and widely separated through 
length to head base; antennae two-segmented, sensorium almost as 
long as terminal seta; mandibles symmetrical with several teeth at 
apex, mola well-developed with series of large teeth on margin; 
sclerites of maxillary base fused, palps two-segmented, mala arcuate 
and blunt at apex, labial palps of a single segment; hypopharyngeal 
sclerome elongate, the arcuate anterior cap may be the reduced 
epipharynx. Thorax and abdominal segments densely covered with 
short spicules, scattered setae are apically enlarged and truncate, 
fluting is visible toward the apex, aciculate setae are found only on 
the lateral margins. Prothorax with large quadrate shield formed by 
dense clustering of larger spicules; medial longitudinal light area 
dividing shield lacking spicules; the remaining thoracic and abdom- 
inal segments each with dark lateral area formed by dense large 
spicules, last abdominal segment lacking urogomphi, somewhat 
explanate, darkened by dense large spicules, with alternating fluted 
and aciculate setae on margin; abdominal segments 1-7 with large 
glandular openings on lateroposterior margins of lateral darkened 
areas. Spiracles annular. Legs well-developed, with five segments, 
coxae widely separated, tarsungulus with single seta. 
The only illustration of an Orthoperus sp. was by Perris in 1852 (in 
Klausnitzer 1978, p. 275). The illustration indicates the general form 
