1076 FAMILY XL. — CORIXID>£. 



brane closely marked with short, transverse undulate, irregular black 

 lines, these so arranged as to form four irregular series on each elytron; 

 embolium pale with apex and a transverse mark behind middle infuscate; 

 legs and under surface pale. Vertex with a short carina at base. Elytra 

 finely rastrate. Male with frontal impression large, broad, oval; pala 

 spoon-shaped, produced and somewhat pointed at tip; ventral segments 

 asymmetrical on the left side; strigil on the right. Length, 7.7 — 8 mm. 



Agricultural College, Miss. ( Weed) . Described from Mexico ; 

 recorded by Van Duzee (1917, 480) from the "Southern 

 States," and by Hungerford (1925a, 142) from Kansas, Min- 

 nesota and the East. It appears to be aberrant as to genus, the 

 smooth surface and sinistral asymmetry of male suggesting 

 Corixa. 



1226 (1455). Arctocorixa trilineata Provancher, 1872, 108. 

 "Brown. Face yellow with a median line on vertex and front; eyes 



black. Prothorax with 8 — 9 transverse lines. Antenna? yellow and 

 brown ; elytra brown with numerous yellow transverse striae on the 

 triangular part of the scutellum (clavus) ; remainder of corium with 

 three longitudinal yellow stripes almost without indentations, these re- 

 placed on the triangular disk of membrane by yellow zigzag marks and 

 lines. Under surface clear yellow with a brown spot at base of abdo- 

 men; tarsi also brown. Length, 6.2 mm." (Provancher) . 



Described from Quebec, where, says Provancher : "It occurs 

 in company with bilineata in all the waters about the environs 

 of the city." Recorded from numerous stations in New Eng- 

 land. Pala of male as in pi. XII, fig. 14. 



1227 (1422). Arctocorixa alternata (Say), 1825, 329; II, 251. 

 Elongate, subparallel, strongly rastrate. General color brown with 



yellow markings; pronotum with eight or nine narrow, nearly uniform 

 dark brown or blackish transverse lines ; clavus with the dark cross-bars 

 relatively broad, parallel, entire, in part forked, nearly uniform through- 

 out; corium with short zigzag undulate pale cross-lines, these inter- 

 rupted to leave a narrow dark stripe each side of disk; membrane with 

 the yellow lines broken into very irregular zigzag flecks and marks; 

 embolium yellow with margins dusky, more widely so near base ; under 

 surface in great part blackish; sides of sterna, last three ventrals and 

 side margins of the others yellow. Male with frontal impression very 

 large, reaching middle of eyes, its sides subparallel; hind margin of 

 pronotum broadly rounded; pala as in pi. XII, fig. 11; pegs 38 — 40 in a 

 single curving row. Female with front convex and apex of hind margin 

 of pronotum obtusely angled. Length, 6 — 8 mm. (Fig. 215, a). 



Common throughout northern Indiana, less so in the south- 

 ern counties. Occurs mainly in woodland ponds and stagnant 

 pools of streams in which the bottom is covered with small 

 sticks and other vegetable debris. Raleigh, N. Car., Sept. 8 



