OF WASHINGTON, VOLUME XVIII, 1916 219 



of the pronotum to the hood of which it forms the ridge and sharp 

 apex. 



From this conformation it results that the front of the pronotum is 

 more strongly sinuate in A. thomsonii than in A. grisea. 1 The anterior 

 angles of pronotum are acute and produced as far as apex of hood in 

 thomsonii; in grisea they are rounded and do not extend as far forward 

 as the hood. 



The ridges hounding the discoidal areas are much more elevated in 

 grisea than in thomsonii. For other characters see the illustrations. 



Type a male from the Uhler collection, collected under stones 

 at Andover, Mass., in April. Other specimens are from North 

 Carolina and Maryland. All of these are in the U. S. National 

 Museum collection. 2 



EXPLANATION OF PLATE XVI 1. 



Fig. 1. Leptophya distinguenda n. sp. 

 Fig. 2. Acalypta grisea n. sp. 

 Fig. 3. Acalypta thomsonii Stal. 



1 It is much more sinuate in A. grisea than is indicated in Mr. Heide- 

 mann's unfinished figure. The discoidal areas of hemelytra also are more 

 pointed posteriori}' than shown in this illustration. 



2 Specimens of A. thomsonii in the same collection are from Massachu- 

 setts. One bears the Uhler mss. name orbiculata. 



