Vol. XXVli] ENTOMOLOGICAL NEWS. 1 03 



New and Noteworthy Hemiptera from New England. 1 



By H. M. PARSIILEV, Bussey Institution, Harvard University. 

 During the past two years I have examined a large num- 

 ber of New England Hemiptera, among which I have found 

 several new forms and numerous species not hitherto sup- 

 posed to occur in this region. The records noted herewith 

 are of special interest, and in several cases the known range of 

 the species is materially extended. Such results show clearly 

 how inadequate is our present knowledge as a basis for gen- 

 eralizations on the distribution of the Hemiptera, and they 

 emphasize the importance of intensive investigations restricted 



to limited areas. 



GERRIDAE. 



Gerris argenticollis sp. nov. (Fig. a). 



Dark velvety brown above with fine sericeous pubescence. Anterior 

 lobe of the pronotum with median and marginal yellow stripes, the 

 former faint, the latter clothed with thick silvery pubescence ; poster- 

 ior lobe with yellow margins. Inner margins of hemielytra marked at 

 base with white between the veins. Under surface black or silvery 

 depending on the direction of the light; acetabula, bases of anterior 

 legs and margins of abdomen marked conspicuously with yellow ; om- 

 phalium and legs variable, black to pale brown. 



Relative proportions: of antennal segments, 1st 26, 2nd 13, 3rd 12, 

 4th 10 ; of intermediate legs, femur 50, tibia 43, 1st tarsal segment 20, 

 2nd 10. 



Thorax comparatively robust; abdominal spines not reaching apex 

 of abdomen. 



$ . Fifth abdominal sternite notched at middle of posterior margin ; 

 sixth abdominal sternite not carinate, ventral surface of abdomen not 



Male genitalia of Gerris, ventral view ; a, G. arffn/icoilis n. sp. ; 

 b, G. margiitalits Say; c, G. biirnni Ivirk. 



1 Contributions from the Entomological Laboratory of the Bussey In- 

 stitution, Harvard University, No. 109. 



