656 



FAMILY XXVI. — ISOMETOPID^E. 



aa. Narrowest part of interocular area wider than one eye; middle and 

 apex of corium fuscous. 632. signatus. 



631 (1274). Corticoris pulchellus (Heidemann), 19.08a, 128. 



Broadly oval. Dark brown or 

 piceous, shining, thickly clothed with 

 subappressed fine short hairs ; elytra 

 creamy-white, basal third and tip of 

 clavus and spot on inner apical angle 

 of corium (sometimes on inner basal 

 angle of cuneus) fuscous; membrane 

 whitish, iridescent; beak, except tip, 

 legs and ventrals 4 — 6 and joint 2 of 

 antenna? yellowish-white. Front of 

 head with a shallow depression each 

 side near the eye. Length, 2 — 2.2 mm. 

 (Fig. 163, a). 



Recorded from New York, 

 Pennsylvania and the Virginias. 

 Taken in July and August at 

 light and by sifting. 



Fig. 163. a, Corticoris pulchellus 

 (Heidi X L6 ; 6, side view of head of 

 C. signatus (Heid.) : c, and d, side and 

 front views of head of ('. uiiicolor 

 (Heid.), an Arizona species. All great- 

 ly enlarged. (After Heidemann, in 

 Proc. Ent. Soc. Wash.). 



532 (1275). Corticoris signatus 

 (Heidemann), 1908a, 129. 



Broadly oval. Head dark brown, 

 vertex, margins and under surface 

 yellowish; pronotum, except basal 

 angles, and scutellum piceous ; elytra yellowish-white, base and apex of 

 clavus and an oblique mark across corium fuscous; membrane whitish- 

 translucent; antenna? brownish-yellow; legs yellowish white, femora 

 often annulate with dark brown; ventrals brown, thickly pubescent; beak 

 brownish, reaching third ventral. Pronotum and scutellum roughly 

 punctate ; upper surface clothed with fine pale hairs. Length, 2.2 — 

 2.4 mm. 



Known only from Washington, D. C, and Texas. 



III. Diphleps Bergroth, 1924, 5. 



Broadly oval, flattened species having the head about as 

 long as middle of pronotum, narrower than apex of latter, tylus 

 broad, almost vertical; ocelli located between the eyes at about 

 their own diameters from inner margin of eyes ; antennae in- 

 serted in front of eyes ; beak reaching first ventral ; pronotum 

 nearly five times as wide as long at middle, its sides flattened, 

 margins reflexed, disk with a fine median carina, each side of 

 which are two small calli (fig. 10), front margin broadly con- 



