[December 
108 Psyche 
B. C., Keen, collector. This species is quite common in 
western North America. 
Gerris buenoi Kirkaldy 
Several specimens, Romaine Brook, Newfoundland, 
August, G. K. Noble. The range extends from coast to 
coast in North America. 
Gerris chilensis (Berg) 
Curico, Chile, 4 specimens. This insect is quite common 
in Argentina and Chile. 
Gerris cariniventris Champion 
Furcy, Hayti, 2 females, collected by W. M. Mann. 
Gerris carmelus, n. sp. 
Moderately large, clothed above with extremely fine 
golden pubescence. Head black, its sides and under-surface 
and a transverse patch above at the base ochraceous, some- 
times these markings more or less replaced with black. 
Antennse brown, darkened apically, the first segment with 
a few short setse near its tip; formula, 40:30:30:27. Ros- 
trum ochraceous, distal segment black, extending beyond 
apex of mesosternum. Pronotum black, the sides and a 
median elongate spot on disc of anterior lobe ochraceous; 
the apex rounded, attaining middle of mesonotum. Mesono- 
tum ochraceous, strongly raised, tumid, almost rectangular 
in outline. Sides of thorax ochraceous, the meso and meta- 
pleura with a longitudinal blackish stripe, this at times 
extending on propleuron. Legs brownish, the intermediate 
femora each produced at the apex into two conspicuous, 
sharp, claw-like spines. Abdomen above blackish. Venter 
ochraceous. Length ( $ $ ) , 7-8.5 mm. ; width 2-2.6 mm. 
(Male). Anterior lobe of pronotum strongly raised and 
sharply delimited from posterior lobe. Front femora some- 
what incrassate and bowed, the inner surface a little behind 
the middle strongly dilated into a prominent blackish tu- 
bercle. Venter indistinctly carinate along the median line, 
the sixth segment about as broad as the fifth; its apical 
margin deeply and roundly excavated at the middle. First 
genital segment very long, slender and cylindrical. 
