SMICRONYX WEEVILS—ANDERSON 263 
elongate, confluent, interspaces forming rugae which run antero- 
laterally from the median line; scales of the disk oriented toward 
median line. Elytra very convex dorsally, so inflated on the sides 
that they are wider behind the middle than at the base; humeri not 
prominent; declivities indistinct. 
Discussion: The above combination of characters set S. amoenus 
(Say) and S. converus, new species so distinctly apart from the rest 
of the species in this subgenus that it would be difficult to include 
those species in either of the other two species groups. S. lineolatus 
Casey and S. triangularis Dietz are included in this group by Dietz 
(1894), but the more prominent humeri, transversely ovate prothoracic 
punctures, and vittate arrangement of the elytral scales of those species 
make that alliance seem improbable. 
The hind wings of several specimens (both male and female) of 
both species in this group were examined, and were found to be 
greatly reduced in each case. Whether or not this means that both 
species are entirely flightless will, of course, not be established until 
the hind wings of hundreds of specimens from many points in their 
respective ranges have been examined. 
Map 7 gives the distribution of this group. 
Map 7.—Distribution of the specimens examined of the amoenus group of Smicronyx. 
@, S. amoenus; A, S. convexus. 
