No. 34-] HEMIPTERA OF CONNECTICUT I ANTHOCORIDAE. 667 



Subfamily Anthgcorinae. 



Key to Genera. 



1. Pronotum trapezoidal, its outline not continuous with that of head; 



membrane with three or four veins 2 



Pronotum conical, becoming cylindrical anteriorly and forming a 

 continuous outline with the elongate head ; membrane with one 

 vein Macrotracheliella, p. 667 



2. Collar of pronotum distinct ; membrane with four veins 3 



Collar obsolete ; membrane with three veins Triphleps, p. 668 



3. Sides of pronotum not explanate ; corium not or obsoletely punc- 



tate ; metasternal canals not elevated at lateral ends 



Anthocoris, p. 667 

 Sides of pronotum explanate, extending anteriorly more or less 

 beyond base of collar ; corium distinctly punctate ; canals promi- 

 nent laterally Tetraphleps, p. 667 



Macrotracheliella Champion. 



This genus includes two species, one from Central America and 

 one from New England. 

 M. nigra Parshley. 



Ent. News, xxviii, 38, 1917. 



Shining black, the third antennal segment narrowly yellow at 

 base. First antennal segment not quite reaching apex of head ; 

 second about twice the length of the first. Length 2.5 mm. 



This species has been taken in Massachusetts and Rhode Island, 

 but not as yet in Connecticut. 



Anthocoris Fallen. 



Species of comparatively large size, having the head longer than 

 wide across eyes and usually four membranal veins, the inner 

 sometimes obsolete. Only one species occurs in New England. 

 A. borealis Dallas. 



List of Hemip., ii, 588, 1852. 



Shining black, clavus exteriorly and corium anteriorly pale ; 

 veins all present but not strongly developed. Length 3.5-3.7 mm. 



Often taken in sweeping. It is probable that Say's description 

 of Reduvius musculus pertains to this species. It certainly occurs 

 in Connecticut, but no records are at hand. 



Tetraphleps Fieber. 



Parshley, Can. Ent., lii, 83, 1920. 



This genus has recently been found to occur in North America. 

 It is readily distinguished from Anthocoris by the explanate sides 

 of the pronotum, which project anteriorly a little beyond the base 

 of the collar. 



