THE WATER-BOATMEN. 1075 



frontal impression deep, extending past middle of eyes; pala as in fig. 13; 

 pegs 17, in an angulated row. Length, 4.7 mm. 



Recorded from numerous stations in New England ; not 

 known elsewhere. 



1223 ( — ). Arctocorixa bradleyi Abbott, 1915, 84. 

 Yellowish-gray to brown; pronotum rastrate, with 5 — 6 dark brown 



parallel bars, these twice or more the width of the alternate yellow lines; 

 elytra dark brown, minutely rastrate, lines of clavus broad, much con- 

 fused and coalescent; those of corium much inosculate, and interrupted 

 to form two or three longitudinal series ; those of membrane partially 

 effaced; lower surface and front and middle legs sordid white; hind legs 

 brown. Male with head short, broad, frontal impression broad, shallow, 

 reaching middle of eyes; pala oblong, cultrate, with 16 — 18 pegs in an 

 even median curved row. Length, 3 — 3.5 mm. 



Described from Billy's Island and other points in Georgia. 

 Known only from that State. 



1224 ( — ). Arctocorixa abjecta sp. nov. 



Chocolate-brown with yellow markings. Head, legs and under sur- 

 face pale yellow; eyes blackish-brown; pronotum with five narrow pale 

 cross-lines of the same width as the brown ones, the second and third 

 often united near the margin; clavus with the pale lines on inner half of 

 basal third oblique and entire, elsewhere interrupted, forming short un- 

 dulate lines ; pale markings of corium and membrane everywhere broken 

 into short sinuous oblique marks, these arranged in four evident but ir- 

 regular longitudinal rows, the inner and outer ones adjacent to the 

 claval suture and costal margin; apex of corium with a pale triangular 

 area opposite middle of membrane; embolium dull yellow, its outer edge 

 and that of corium blackish; hind tarsi fuscous. Vertex relatively nar- 

 row with sides parallel, its width about two-thirds that of basal width 

 of eye, its basal half carinate and with two irregular rows of punc- 

 tures. Pronotum distinctly rastrate, two-thirds wider at middle than 

 long, its apical third carinate. Clavus and corium almost smooth. Male 

 with frontal impression narrow, oval, reaching apical third of eyes; 

 pala broad, cultrate, pegs about 20, the row median at base, thence 

 gradually curving upward and following the dorsal margin. Female 

 with vertex slightly wider; front convex and with an obtuse median 

 carina. Length, 3—3.2 mm. 



Very common in the ponds and ditches about Dunedin, Fla., 

 Nov. 18 — April 23. Evidently allied to bradleyi, but the alter- 

 nate pale and dark pronotal lines of equal width and the row of 

 pegs median only at base. 



1225 (1428). Arctocorixa edulis Champion, 1901, 380. 



Elongate, smooth, shining, yellowish-testaceous; pronotum with 10 — 

 12 very slender transverse black lines ; those on apical half in part ab- 

 breviated; clavus, except for an oblique space at base, corium and mem- 



