344 
Psyche 
[September-December 
thick cross vein; several of the cross veins between CUA and CUP 
forming a few large, closed cells; 2A with two deep forks. 
Holotype: no. 5882, Museum of Comparative Zoology. This 
consists of a single fore wing, lacking about the apical quarter; 
the preserved portion is very clear. Whether Ml +2 is actually 
coalesced with RS or only connected to it by a cross vein cannot 
be determined in the type specimen; in either case, the nature of 
the connection is probably subject to much individual variation, 
as in most other Protorthoptera. 
Opisthocladus strictus, n.sp. 
Figures 5 and 6 
Fore wing: length (as preserved), 13 mm; estimated complete 
length (based on Tococladus ), 15 mm. Costal veinlets near the 
base strongly sigmoidal and forming a short submarginal vein; 
other costal cross veins nearly straight and not looped; SC termi- 
nating on R1 at about mid-wing, only a short distance beyond the 
origin of RS; M and CU much as in arcuatus, but cross veins more 
definite. 
Holotype: no. 5881, Museum of Comparative Zoology. This 
consists of a complete insect showing a dorsal-ventral view of the 
body, with the fore and hind wings over-lapped on each side (fig- 
ure 6). Although the preservation is excellent, parts of the fore 
wings and virtually all of the hind wings are obscured. Figure 5 
is a composite drawing of the fore wing venation based on both 
of the wings. The body is 13 mm long, from the tip of the mandi- 
bles to the end of the abdomen; the head is 2.5 mm long. Only 
fragments of the antennae are preserved; they indicate a very 
slender antenna, of at least moderate length. The head, seen in 
dorsal view (probably distorted into an abnormal, prognathous 
position), shows the mandibles clearly; they are relatively long and 
dentate. The eyes are prominent. The thoracic nota are distinct, 
the segments apparently not fused, and the metathorax is the 
largest. Little can be seen of the legs; the abdomen, as preserved, 
is very short, most of the segments apparently being contracted. 
Terminal structures on the abdomen, including cerci, cannot be 
discerned. 
This species differs from arcuatus in lacking the looped costal 
veinlets, and in having the origin of RS closer to the end of SC 
