336 CALIFORNIA ACADEMY OF SCIENCES [Proc. 47H Ser. 
of the Pacific coastal portion of the United States. The females 
are, in general appearance, nearest occidentalis. 
Fig. 6—Conocephalus exitiosus (McNeill). Dorsal view of male cercus. 
Type. James Island, Galapagos Islands. (X11) 
It is of interest to note that, of the many tropical American 
species of Conocephalus, none shows close affinity to exitiosus. 
The following features are noted in the male type. Caudal 
tibize armed distad with three pairs of spurs. Subgenital plate 
not produced disto-laterad in sharp spikes, disto-lateral styles 
small and filiform, the sockets of which are produced beyond 
the transverse distal margin of the plate. Cerci with. mesal 
portion not contrastingly swollen and with a heavy mesal (in 
vertical sense) tooth, so that its base is entirely visible from 
above; distal portion elongate conical, with blunt apex hardly 
at all depressed”. Form moderately robust. Vertex scarcely 
ascending, fastigium very slightly wider than proximal anten- 
nal joint. Eyes normal. Pronotum with lateral lobes consider- 
ably longer than deep, ventro-cephalic angle distinct though 
rounded. Convex callosity vary broad, humeral sinus subobso- 
lete. Abdomen immaculate. Caudal femora rather short, with 
proximal swollen portion heavy, ventral margins unarmed, 
genicular lobes not spined?*. Tegmina much as in nemoralis, 
reduced, covering slightly more than half the dorsal surface of 
the abdomen, veins heavy, stridulating area large, apex of teg- 
men rather broadly rounded. 
The female allotype shows, in addition, the following diag- 
nostic features. Tegmina slightly more elongate than in male, 
with apices slightly less broadly rounded. Ovipositor heavy, 
tapering distad to the acute apex, the shaft showing a very 
weak upward curvature, its ventral margin being straight in 
the proximal two-thirds. 
22Tn form of the cerci, exitiosus is seen to be almost intermediate between nemoralis 
and occidentalis. 
23 This is the only American species of the genus known to us in which the genicular 
lobes of the caudal femora are unarmed. 
