98 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



and acute at apex, the apical margin of the hook truncated 

 across its whole width. 



Color, clear green, becoming yellowish on the callosities, 

 head, and lower surface, and the legs and antennae pale, the 

 latter somewhat infuscated beyond the basal joint; tip of the 

 tibiae and the tarsi brown or black. Upper surface clothed with 

 black hairs, interspersed with pale buff ones, the latter segre- 

 gated into roundish spots, giving the insect a mottled aspect 

 when fresh. Membrane slightly evenly infuscated, the nerv- 

 ures and surface of the areoles clear green. 



This European species seems to be widely distributed in the 

 east. I have examples from Montreal, Ottawa, Lake Tema- 

 gami, P. Q., and Ridgeway, Ont., also from New York, New 

 Jersey, District of Columbia, Virginia, Ohio, and Kansas. It 

 may at once be distinguished from its allies by the green sur- 

 face of its areoles and the peculiar yellowish mottled aspect of 

 the fresh examples. 



7. Orthotylus chlorionis Say. 



Closely allied to the preceding; clear green, clothed above 

 with minute fuscous hairs, but without an intermixture of pale 

 ones, at least in any of the numerous specimens I have seen; 

 membranal areoles concolorous. Length 3 3^2 -4mm. to tip of 

 the membrane. 



Head as in the preceding, but with the vertex and front 

 somewhat fuller ; the basal depression of the vertex narrow, ill- 

 defined before, the basal carina prominent. Antennae short, 

 the first joint shorter than the head. Pronotum short, the sides 

 straight, with the anterior angles well rounded. Callosities 

 bounded by a sharp depressed line behind, not as prominent 

 as in the allied species. Elytra rather short, the abdomen 

 reaching to about the tip of the cuneus in both sexes. Tibial 

 bristles short and weak, not longer than the thickness of the 

 joint. 



Male genital pieces very small, the dextral hook hardly 

 more than twice longer than broad, ligulate; sinistral curved, 

 narrow, parallel, lying along the ventral edge of the genital 

 segment. 



