No. 34-] HEMIPTERA OF CONNECTICUT: BELOSTOMATIDAE. 397 



Benacus Stal. 



There is only one known species of this genus, B. griseus, and 

 the character of the non-sulcate anterior femora is sufficient to 

 separate it from every other American representative of the family. 

 B. griseus (Say). 



Desc. Het. Hem., p. 39, 1832, 



{haldemanus Leidy.) Journ. Acad. Nat. Sci., Phila. (2) i, 66, 1847. 



This species is recorded from Canada to Mexico and Cuba. 

 Large specimens are the largest of our native Belostomatids. 

 Little is known of its breeding habits, except that it lays its ellipti- 

 cal striped eggs around the stems of rushes. Its other habits have 

 already been explained. 



New Haven, 22 May, 191 1 (A. B. C.) ; Meriden, 29 July, 1917 (J. S. 

 Miller). 



Lethocerus Mayr. 



(Amorgius Stal. Belostoma Auctt. nee Latreille.) 



Little more can be said about these species than about Benacus. 

 The eggs are laid in masses under stones, planks or logs in wet 

 places near their haunts. (See PI. xix, 6.) The key suffices to 

 separate them. 



Key to Species. 



1. Vertex narrowing anteriorly, sides of body slightly curved 2 



Vertex parallel; sides of body nearly straight, subparallel uhleri 



2. Vertex wider than the width of one eye; legs comparatively 



slender ; prothorax not very stout ; relatively small and slender 



insect (45 mm. long) obscurus 



Vertex subequal to width of one eye ; legs comparatively stout and 

 long; prothorax stout; a relatively large and stout insect (50mm. 

 long or over) americanus 



L. americanus (Leidy). (PL xvi, 4.) (Figs. 39, 40.) 



Jour. Acad. Nat. Sci. Phila., vi, 58, 66, 1847. 



New Haven, 27 Mar., 1909 (P. L. B.) ; 22 May, 1911 (A. B. C.) ; Lyme, 

 14 Sept., 1909 (C. H. Davidson) ; Cromwell, 9 Apr., 1919 (M. P. Z.) ; 

 Hamden, 7 June, 1919 (K. F. C.) ; Cornwall, 16 May, 1920 (K. F. C). 



L. obscurus (Dufour). 



Ann. Soc. Ent. Fr. (4) iii, 383, 1863. 



Torrington (R. Hochstein). 

 Lf. uhleri (Montandon). 



Ann. Soc. Ent, Belg., xl, 513, 1896. 



It is doubtful if this species occurs in Connecticut, since it seems 

 to range from New Jersey southward. 



Belostoma Latreille. 

 (Zaitha Amyot and Serville : Perthostoma Leidy.) 

 The species of this genus are all more or less oval and smaller 



