4© CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Second antennal joint flattened and greatly expanded; antennal 

 sockets small, rim-like; front reduced to a mere sulcus, the 

 lateral carinae contiguous 3 



2. Front broader, with a median carina usually indicated, its width 



at least one-third its length ; vertex transverse, sloping into the 



base of the front Lamenia, p. 40 



Front narrow, without a median carina ; its width never one- 

 fourth its length; vertex horizontal, narrowed before, angled 

 to the base of the front Cenchrea, p. 41 



3. Second antennal joint split into two to four filaments 



Otiocerus, p. 43 

 Second antennal joint entire 4 



4. Second antennal joint hardly more than twice longer than broad 



Cyclokara, p. 41 

 Second antennal joint obviously more than twice longer than 

 broad 5 



5. Ocelli absent; second antennal joint narrow, subterete, a little 



wider apically; rostrum short, reaching the base of the hind 



coxae Anotia, p. 42 



Ocelli present; second antennal joint broad, linear, with a sub- 

 apical notch for the seta ; rostrum long, reaching the middle of 

 the venter Amalopota, p. 41 



Lamenia Stal. 



Shorter winged forms recalling Ormenis in miniature, and often 

 pruinose as in that genus. Their broader and subglobose front 

 will serve to distinguish them from our other Derbidae. I 

 cannot agree with Mr. Muir in restricting Lamenia to oriental 

 forms and placing our species in genus Herpis Stal. 



Key to Species. 



1. Color soiled white, maculated all over with fuscous and with a 



fuscous median line on the head, pro- and mesonotum maculata 



Insects nearly uniform in color, without maculations 2 



2. Color testaceous, becoming more or less fulvous on the head, pro- 



and mesonotum edentula 



Color slaty-black, almost immaculate, white pruinose when fresh 3 



3. Larger, 4-4.5 mm. ; inner margin of the male plates entire or 



nearly so vulgaris 



Smaller, 3-3.5 mm. ; inner margin of the male plates distinctly 

 notched near their base obscura 



L. vulgaris (Fitch). 



Homop. N. Y. St. Cab., 47, 185 1. 



A small blackish-fuscous insect, usually covered with a white 

 bloom. Found throughout the eastern United States and Canada, 

 usually on oaks. 



East Wallingford, 6 July, 1904, Torrington, 7 July, 1905 ( W. E. B.) ; 

 Branford, 28 July, 1915 (H. L. V.). 

 L. obscura Ball. 



Can. Ent., xxxiv, 262, 1902. 



A smaller species than vulgaris but otherwise very similar. It 

 has the same distribution but does not seem to inhabit the oak. 



