THE SMALLER WATER STRIDERS. 993 



similar spots; tibia? and tarsi pale brown; under surface dark brown, 

 clothed with very fine bluish-gray pubescence. Head without a median 

 impressed line. Antennae long and very slender, joint 1 three-fifths 

 longer than 2, 3 twice as long as 2, 4 as in key, nearly twice as long as 

 width of vertex. Pronotum slightly wider at middle than long, its hind 

 margin with apex narrowly rounded. Wingless form — Elongate, sub- 

 fusiform, male; stouter, oblong and subparallel, female. Brownish-yel- 

 low, first two dorsals blackish-brown, next three greenish-yellow; under 

 surface greenish-yellow, the sides of ventrals pale. Male with hind 

 femora and tibia? armed beneath with a row of short spines. Female 

 with connexiva more strongly subvertically elevated than male. Length, 

 2.2—2.5 mm. 



Mobile, Ala., Sept. 8 (Gerhard) . Plummer's Island, Md., Aug. 

 15 {Barber). White Plains and Valhalla, N. Y., September — 

 October (Bueno). Described from Guatemala. Definitely re- 

 corded in this country from Massachusetts, New York, New 

 Jersey, Illinois, Maryland and Georgia. Bueno (1923, 421) says 

 of this species: "It is the largest of our eastern forms except 

 americana, from which its slim body, long thin antennae and 

 white spangled hemelytra at once distinguish it." 



1130 (— ). Microvelia buenoi Drake, 1920a, 20. 



Winged form — Elongate, subfusiform. Head, pronotum and under 

 surface dark velvety brown; base of antenna?, a transverse line on front 

 margin of pronotum, coxa? and femora in great part, yellow ; elytra 

 brown, the membranous cells whitish; antenna?, tibia? and tarsi paler 

 brown ; head with silvery-gray hairs next the eyes and under surface 

 clothed with fine grayish hairs. Antenna? as in key. Pronotum slightly 

 wider across middle than long, humeral angles rounded, nodulose. Elytra 

 covering the abdomen. Female a little larger and more robust than 

 male. Wingless form — Blackish-brown; abdomen with a spot of silvery 

 hairs on each side of the first two and last two dorsals, and on each con- 

 nexival. Pronotum at middle about three times as long as mesonotum. 

 Length, 1.7 — 2 mm. 



Clark Junction, Lake Co., Ind., July 4 ; Chicago, 111., April — 

 May (Gerhard). Described from near Cranberry Lake, N. Y. 

 Recorded also from Massachusetts, Michigan and Minnesota. 

 "The species dwells in small secluded coves very near the shore, 

 usually under the shelter of overhanging vegetation or among 

 aquatic plants. A few were taken on moist ground quite near 

 the water's edge." (Drake). 



1131 (1306y 2 ). Microvelia fontinalis Bueno, 1916a, 58. 



Wingless form — Oblong-oval or subfusiform, rather robust. Above 

 dark reddish-brown thickly clothed with fine appressed yellowish hairs; 

 head with a median blackish line; front margin of pronotum, middle of 

 first and second dorsals and a large spot above and below on each con- 



