ENTOMOLOGICAL NEWS. 319 
his distinct little species is to be placed in our list between 
bi ma and americanus. From the former it differs by hav- 
‘only one subhumeral stria, the fifth dorsal stria short, api- 
Re Crees ornia sheen; the possession of a 
distinct subhumeral stria, and the rather depressed prosternum 
MMM Ghitet besel stria distinguishes davisi from omgri- 
anus. The possession of prosternal striae would place this 
in Dr. Horn’s group servus, but as these striae are 
» and absent in some specimens—which is also found 
occasionally in defectus and servus—and the mesosternum is 
= inctly truncate I prefer to place it with americanus and 
Most of the specimens before me were collected by my 
iend, Mr. William T. Davis, to whom this species is dedi- 
i ie 
a 
i. 
Se 
a number and size of the elytral and thoracic striae have 
-: distinguish a number of species. However, one 
of the other of the elytral striae varies or may be entirely ab- 
. Ihave a specimen of defectus Hald. from Southern New 
nt ne 
1 behind ; another specimen which I collected in Lake- 
| ‘the fourth elytral stria represented by a short basal 
had stria. A specimen from New Jersey (O. Dietz), 
_ belonging in Dr. Horn’s americanus group, differs only from 
the description of exaratus by having the surface distinctly 
The punctuation in perplexus is sometimes so fine 
that it can be easily overlooked and the outer thoracic striae 
are occasionally extremely short,.which seems to show that 
— perplexus and exaratus are one variable species. 
 Listrochelas tarsalis.o. sp. 
Form of opacicollis Horn which it also resembles in the opaque and 
pruinose upper surface. Head densely cribrately punctate and hairy ; 
frontal suture obsolete ; clypeus transverse, feebly emarginate at mid- 
dle, margin feebly reflexed. Thorax strongly transverse; sides angu- 
fately rounded below middle; margins coarsely crenulate and fim- 
briate; apical and basal angles rounded; surface sparsely, obsoletely 
_. punctate. Elytra sparsely but distinctly punctate, each puncture bear- 
ing a moderately long hair; sutural costae feeble; discal costae absent. 
iC 
