﻿NEARCTIC SPECIES OF GASTERUPTIIDAE — TOWNES 



99 



Forewing about 12 mm. long; as seen from above, head about 0.7 

 as long as wide; frons with medium-sized dense punctures, medially 

 more or less finely punctatorugose or transversely wrinkled; top of 



Figure 16. — a-j. Heads of species of Aulacostethus viewed from directly above showing 

 occipital carinae and lengths and shapes of temples; k-n, heads of species of Aidacus 

 viewed anterodorsally showing frontal wrinklings. 



