66o 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 



and the eggs by Limnodites gerriphagus, a minute aquatic 

 hymenopteron. The species is rarely found fully winged. 



New Haven, 21 Oct., 1903 (H. L. V.) ; 18 March, 191 1 (B. H. W.) ; 

 Torrington, 7 July, 1905 (W. E. B.) ; Cheshire, 6 May, Orange, 21 May, 

 Hamden, 28 May, 1911; Portland, 15 Aug., 1913 (B. H. W.) ; Farmington, 

 24 May, 1914 (W. M.) ; Winnipauk, 4 Aug., 1908 (C. W. J.). 



Antenna 



Fig. 150. Gerris buenoi Kirkaldy, — dorsal view. 

 Drawing by Dr. Philip Garman. 



Greatly enlarged. 



G. (Aquarius) conformis (Uhler). (PI. xvi, 9.) 



Proc. Bost. Soc. Nat. Hist, xix, 435, 1878. 



This form is less abundant, but is alvi^ays found fully vi^inged. 

 It ranges south along the Atlantic seaboard. 



Orange, 21 May, Hamden, i June, 191 1 (B. H. W.) ; Hartford, 14 May, 

 1914 (W. M.). 



Key to Species. 



{Gerris S. Str.) 



I. Sixth abdominal segment with rather small and short spines ; stout- 



ish species, mostly winged 2 



Sixth abdominal segment produced into a long, acute spine ; a com- 

 paratively long and slender species canaliculatus 



