SUBFAMILY VII. — DER^EOCORIN^E. 883 



The subfamily is represented in the eastern states by five of 

 the seven known North American genera. 



KEY TO EASTERN GENERA OF SUBFAMILY DER.EOCORIX-iE. 



a. Vertex transversely striate and with a longitudinal sulcus; joint 2 

 of hind tarsi much shorter than either 1 or 3. 



b. Antennas linear, of nearly equal thickness throughout, joint 2 



scarcely enlarged at apex, 3 and 4 linear. I. Eustictus, p. 883. 

 bb. Joint 2 of antenna? clavate, 3 and 4 short and thick, fusiform. 



II. Diplozona, p. 887. 

 aa. Vertex more or less polished, scarcely striate or sulcate; joints 1 

 and 2 of hind tarsi subequal. 



c. Head strongly produced and nearly horizontal, surpassing apex of 



first antennal; second antennal thick, nearly linear, longer than 

 the other three united; upper surface covered with stiff erect 

 hairs; embolium thin, broadly expanded, sides nearly parallel. 



III. EURYCHILOPTERELLA, p. 887. 



cc. Head less produced, scarcely surpassing middle of first antennal; 



upper surface either pubescent or subglabrous ; embolium not as 



above. 



d. Pronotum distinctly margined; first antennal surpassing tip of 



tylus by less than half its length; hind margin of eyes nearly 



in contact with pronotal collar; scutellum punctate. 



IV. Camptobrochis, p. 888. 

 dd. Pronotum not margined; first antennal surpassing tip of tylus 

 by more than half its length; eyes sloping forward away from 

 collar; scutellum impunctate (except in D. ruber Linn.). 



V. Der^eocoris, p. 892. 



I. Eustictus Reuter, 1909, 35. 



Elongate- or oblong-oval, shining, subglabrous species hav- 

 ing the head one-half the width of base of pronotum, its front 

 vertical, transversely strigose, vertex without basal carina ; 

 eyes of male usually much larger than those of female; beak 

 reaching first ventral ; antennae as in b of key ; pronotum one- 

 half or more wider at base than apex, sides straight, basal half 

 convex, declivent forward, shallowly and sparsely punctate, 

 hind margin broadly rounded, calli large, rather low, oblique, 

 occupying most of the apical two-fifths of disk ; elytra entire, 

 reaching tip of abdomen, cuneus feebly reflexed, as wide or 

 wider at base than long ; legs long, hind femora slender, reach- 

 ing tip of abdomen, female, slightly surpassing tip, male. 

 Other characters as in key. Six species have been recorded 

 from the eastern states. They have in the past been mostly 

 recorded under the generic names Megacoelum Fieb. and Cimatlan 

 Dist. 



