30 
(iEO. H. HORN, M. D. 
APPENDIX. 
fflDOSTETHlTS Lee. 
This genus does not seem to be generally known to collectors, so 
that but few specimens have ever been sent me for determination. It 
differs from Cryptohypnus in having the claws abruptly dilated at 
basal half as shown in fig. 8, pi. 1. The prosternal sutures are 
arcuate, but in a less degree than in the species of Cryptohypnus 
with sutures. 
Oe. femoralis Lee.. Revis. Elat. p. 489. 
This is the only species known. It greatly resembles C. restrictuhis, 
having the stride of elytra feebly distinct on the disc and obliterated 
at the sides, the color and form being also quite similar. The max- 
illary palpi are rather slender and similar to restrictulus. 
It is known to me from Canada, westeim Pennsylvania and 
Colorado. 
.4KTHRACOPTERYX u. g. 
Frontal margin not elevated, confluent with the edge of the cly- 
peus. Antennte a little longer than the head and thorax, joints 3-10 
feebly serrate, nearly equal in length, eleventh longer, second shorter, 
first joint stout, nearly as long as the next two. Maxillary palpi 
long, the last joint (of both palpi) cultriform, longer than the two 
preceding joints together. Thoracic margin acute, when seen later- 
ally nearly straight, terminating opposite the middle of the eye; 
scutellum oval, slightly transverse. Elytra oblong, humeri obliquely 
rounded, body apterous. Prosternal lobe rather short, the mouth 
exposed beneath, the sutures straight, slightly convergent posteriorly, 
tip of prosternum acute, flexed upward toward the body- Posterior 
coxal plates abruptly dilated at inner third. Tarsi as long as the 
tibije, the first four joints decreasing gradually in length and not 
lobed, claws simple. 
The above description briefly defines a form which it is by no 
means easy to place. From the method of classification adopted by 
Dr. Candeze, which assumes the form of the front as the character 
of greatest primary moment, the genus should be referred to the 
division Corymbitites and to the group Dirnites. From Dr. Can- 
deze I have received the following note: “ For me there remains no 
doubt, after a mature examination, that it can be placed in the 
Dimites, where it will form a new genus related to Diadysis (of 
Australia) and Asorno (of Patagonia) which I will hereafter j)lace 
in the Diiuites.” 
