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



7, Membrane infuscated at apex, marked with a distinct white spot at tip 

 of the cuneus followed by a blackish cloud and beyond that a pale 

 vitta, sometimes obsolete, 5. coagulatus Uhl. 



— , Membrane without alternating black and white markings at tip of 

 the cuneus, 8. 



8, Upper surface with minute pale pubescence; apical antennal joints in- 



fuscated, 9. 



— , Upper surface with dark fuscous or black pubescence, 11. 



9, Smaller (4-4j^mm.) ; first antennal joint thicker, obviously shorter 

 than the head viewed from above; sinistral hook of the male genitalia 

 short, scarcely longer than the dextral, 10. translucens Tuck. 



— , Larger (5-5>4mm.) ; first antennal joint obviously as long as the 

 head 10. 



10, Basal joint of tlie antennae fulvo-testaceous like the second joint; dex- 

 tral hook of the male genitalia small, ligulate; sinistral long, curved 

 and acuminate ; western, 9. uniforniis, n. sp. 



— , Basal joint of the antennae brown, the second fulvo-testaceous; dextral 

 hook of the male genitalia large and broad-triangular ; sinistral linear 

 and straight, rather long ; eastern, 12. viridis, n. sp. 



11, Elytra surpassing the abdomen by nearly one-half its length; abdomen 



in the male reaching to just beyond the base of the cuneus; antennae 



and membrane slightly infuscated, 8. fraternus, n. sp. 



— , Elytra shorter, the abdomen of the male reaching well toward the apex 

 of the cuneus, 12. 



12, Upper surface clothed with deciduous black hairs which are in part 



flattened and conspicuous ; color pale bluish-green ; vertex broadly 



depressed, .3. ferox, n. sp. 



— , Upper surface clothed with a less conspicuous vestiture, the hairs not 

 large and flattened; color a yellowish-green; transverse basal depres- 

 sion of the vertex narrow, 13. 



13, Areoles of the membrane pale green; elytra with clusters of white 

 hairs intermixed with dark ones, 6. flavosparsus Sahlbg. 



— , Areoles of the membrane concolorous ; elytra without pale hairs in- 

 termixed with the dark ones, 7. chlorionis Say. 



14, Form ovate as in Lygus campestris nearly ; color a uniform whitish 



of fusco-testaceous, head and callosities tinged with yellowish, 



15. catulus, n. sp. 



— , More elongated species ; elytra with fuscous areas more or less marked, 

 or at times entirely black, 15. 



15, Color whitish-testaceous, fuscous markings of the elytra very faint or 

 nearly obsolete in the female, 16. 



— , Ground color sometimes pale greenish or yellowish, the dark elytral 

 markings always distinct, or the whole insect may become almost 

 black, 17. 



16 .Without black markings, the disk of the head and the pronotum behind 

 the callosities sometimes with a faint fuscous cloud in the male ; mem- 

 brane with a faint ray beyond the areole; antennae pale, 



16. latiguidus, n. sp. 



— , Median line of the front, vertex and scutellum, lateral margins of the 

 pronotum and the sides of the body beneath black; membrane slightly 



infuscated with the nervure brown ; antennae blackish, 



32. candidatus, n. p. 



17, Body uniformly fuscous, the sides of the venter darker ; length 

 6mm., 34. fumidus, n. sp. 



— , Body never uniformly fuscous, the elytra with at least the costal nerv- 

 ure or a vitta interior to it pale 18. 



18, Elytra with the costal and commissural nervures and base of the cuneus 



slenderly pale, otherwise fuscous-brown above; length 7mm., 



33. necopinus, n. sp. 



