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



Described from 80 examples representing both sexes, taken 

 on Dalea enioryi at Palm Springs, Calif., May 18-22, 1917. A 

 few examples were also captured on a species of Atriplex where 

 they probably were resting. This is identical with the "imma- 

 ture variety" (No. 777) mentioned by Dr. Uhler in his de- 

 scription of Hadroncma decorata but it is a very distinct species. 

 It is still nearer H. splendida Gibson (Can. Ent., 1, p. 84, 

 1918) but is sufficiently distinct. 



Holotype (No. 419), male, allotype (No. 420), female, and 

 paratypes in collection of the California Academy of Sciences. 



28. Orthotylus hamatus, new species 



Form and size of lauguidus nearly; clear light green; mem- 

 brane uniformly whitish hyaline ; length 6 mm. 



Elongate oval, rather broad, nearly smooth, clothed only with very 

 minute pale pubescence. Vertex flattened across the base in the male, 

 scarcely so in the female, the basal carina sharp. Front moderately convex, 

 less so in the male; characters of the head about as in languidus; clypeus 

 prominent ; antennae short ; second segment distinctly shorter than in 

 languidus, hardly longer than the basal width of the pronotum. Pronotum 

 about as in languidus, its length one half its basal width ; sides straight ; 

 callosities large, oval, widely separated ; hind margin concavely arcuated. 

 Elytral costa slightly arcuated. Apex of abdomen reaching to middle of 

 cuneus in the male, to its apex in the female. Rostrum attaining the pos- 

 terior margin of the metasternum; first segment slightly surpassing the 

 base of the head. Dextral clasper of male broad, strap-shaped, truncate at 

 its incurved apex, its base broadly extended dorsally and armed with a 

 sharp curved hook which is parallel to and about half as long as the broad 

 ventral portion, Sinistral clasper linear, subterete, attaining the apex of 

 the ventral plate of the genital segment. This genital conformation is very 

 nearly as in languidus with the addition of the sharp parallel dorsal hook 

 added to the dextral clasper. 



Color a pale clear bluish green deepened along the clavale suture ; head 

 and breast sometimes paler; membrane whitish hyaline, very slightly infus- 

 cated in the male, the apical margin slenderly darker. Eyes and tip of the 

 tarsi and rostrum black. Antennae tinged with yellow and somewhat in- 

 fuscated at apex. 



Described from three male and seven female examples taken 

 on willows growing by the river above Colton, Calif., May 28, 

 1917, and one female taken at Soboba Springs near San 

 Jacinto, Calif., June 2, 1917. 



This species may be distinguished from langiiidns by its more 

 pronounced green color, the darker line along the claval suture, 

 the uniformly hyaline membrane and especially by the want of 



