102 Journal New York Entomological Society, t^'o'- xxix, 



— . Anterior lobe of pronotum over twice as long and fully as wide as poste- 

 rior lobe. Interocular space over twice as wide as diameter of eye. 

 Apex of membrane not triangularly pale. Tibial tooth nearer apex 

 than base. Commonly brachypterous (California) sobrius Uhl. 



5. Anterior and posterior lobe of pronotum nearly equally long, the former 



plainly wider than long, sparsely setose. Fore tibia nearly straight. 

 Basal segment of posterior tarsus nearly three times as long as second 

 and third segments together. Hind tibia with fine stiff bristles only 



(Southwest U. S.) rubricatus n. sp. 



— . Anterior lobe of pronotum longer than wide, nearly twice as long as pos- 

 terior lobe. Fore tibia plainly curved. Basal segment of posterior 

 tarsus scarcely twice as long as second and third segments together. . .6 



6. Dorsal parts, antennae and legs rather densely setose. Hind tibia provided 



with numerous long setose hairs between the stiff bristles. Membrane 



almost entirely pale (Colorado) coloradensis n. sp. 



— . Dorsal parts, antennae and legs sparsely setose. Hind tibia scarcely setose 

 between the fine bristles. Membrane triangularly pale at apex (South- 

 west U.S.) nitidulus Uhler. 



7. Corium outwardly without a postmedian transverse fascia 8 



— . Corium outwardly with a postmedian transverse fascia 11 



8. Corium with narrow costal margin pale. Fore femora provided only with 



an inner series of spines 9 



— . Corium broadly pale without the median vein. Fore femora with an inner 

 and outer apical series of spines. Ventral lunate vittas sometimes ob- 

 scured by coating of fine hairs (Pacific Coast) ... .latimarginatus n. sp. 



9. Ventral lunate vitta; not obscured by coating of fine hairs. Posterior lobe 



of pronotum commonly wider than anterior lobe. Anteocular distance 

 to apex of antenniferous tubercles nearly equal to postocular space or 

 the former plainly not twice as long as the latter. Membrane either 



streaked through the middle or much mottled with pale 10 



— . Ventral lunate vittae much obscured by coating of fine hairs. Anterior and 

 posterior lobe of pronotum of nearly equal diameter. Anteocular dis- 

 tance to apex of antenniferous tubercles nearly twice as long as post- 

 ocular space. Outer basal angle and basal veins of the membrane pale 

 (Eastern U. S.) obscurus n. sp. 



10. Membrane broadly streaked with pale through the middle. Anterior lobe 



of pronotum scarcely setose, less transverse and plainly longer than pos- 

 terior lobe. Second segment of antenna nearly two and one half or 



three times as long as basal (Eastern states) depictus n. sp. 



— . Membrane spotted with pale. Anterior lobe of pronotum sparsely setose, 

 very transverse, exclusive of collar only slightly longer than posterior 

 lobe. Second segment of antenna about twice as long as basal (South- 

 west U. S.) litigiosus Stal. 



1 1. Terminal segment of antenna pale ringed at base 12 



— . Terminal segment of antenna not pale ringed at base 13 



