Vol. 1] Van Duzee. — New Orthotylini. 219 



of the females will distinguish this genus from OrtJiotylus and 

 its allies. Our species may be distinguished as follows : 



Antennae black 1 



Antennae pale 2 



1. Legs pale, the body beneath mostly pale 2. simplex Uhl. 



— Legs black, the body beneath mostly black 1. nigripes Eeut. 



2. Tibial spines slender, pale 3. sericata Uhl. 



— Tibial spines stouter, black 4. atriseta n. sp. 



1. Labopidea nigripes (Rent.) 



A large, stout, bluish-green species with minute pale pubes- 

 cence, and antennae, legs and all beneath black. Male nearly 

 the form of llnacora malina Uhl., elytra about parallel, with apex 

 of corium almost attaining tip of abdomen; female broad-ovate, 

 widest at base of membrane, tip of membrane scarcely if at all 

 surpassing abdomen. Length 5.5 mm. to tip of membrane. 



Head large; vertex broad, nearly four times as wide as the 

 small eyes, hind margin arcuate and somewhat thickened or 

 subcarinate, transverse depression appearing foveate. Front 

 prominent, convex, scarcely polished. Antennae rather long; 

 first joint scarcely as long as head; third two-thirds length of 

 second ; fourth short, about one-third length of third. Pronotum 

 short, transverse ; callosities small, prominent and distant. Hairs 

 on antennae and legs pale and inconspicuous. 



Dextral hook of male genitalia ovate at base, incurved apex 

 narrower but obtuse; sinistral hook broad, convex basally, pro- 

 duced distally, with an acute hook at either angle. 



Color uniform bluish-green above, becoming yellowish on 

 vertex and front of pronotum ; marked with black as follows : 

 eyes, antennae, a large round spot on front reaching to antennal 

 sockets, tylus, legs, sternum, membrane and abdomen, or at least 

 a broad, median vitta on tergum and venter. Callosities some- 

 times black. 



The type was from Ormsby County, Nevada, and I took a 

 small series at Fallen Leaf Lake, California, in July, at an alti- 

 tude of 6300 feet. Dr. J. C. Bradley has sent me two females 

 that he took at Roger's Pass in the Selkirk Mountains, British 

 Columbia, in July, 1908. These differ from the type form in 

 having a darker vestiture and in having a black mark covering 

 the callosities and most of the front of the pronotum and a black 

 dot on either side of the base of the vertex. 



