80 TJRANSACTIONS OF THE [1890 



Length to tip of venter, 5-6 millims. To tip of membrane, 

 7-8J millims. Width of base of pronotum, 1^ millims. 

 Length of corium, 3|— 4 millims ; of membrane, 3-3 J millims; 

 breadth of the same, lf-2 millims. 



This beautiful and remarkable insect has a wide distribution 

 and is variable in depth of color and extent of wing covers. It 

 has been taken on the plains in Dakota, Idaho, Colorado and 

 Montana. I have examined a specimen from Santa Barbara, 

 Cal., and two others have recently been sent to me from Los 

 Angeles by Mr. Coquillett, to whom it gives me much pleasure 

 to dedicate this genus. A variety has the corium yellowish 

 white, with a large fuscous triangle at tip, the cuneus is also 

 white, with a small fuscous tip, and the membrane fuscous 

 throughout. Only males have been examined. 



Xendus Dist. 

 1. X. regalis. New sp. 



Elongate, subcylindrical, black, opaque, with the posterior 

 lobe of pronotum, pictus and lower part of head rufous. Head 

 vertical, blunt, short, smooth, hardly polished, very slightly 

 pubescent on the sides, vertex convex and with the longitudinal 

 impressed line continued almost to the front ; rostrum slender, 

 reaching to near the middle coxae, pale piceous, black piceous 

 on the basal joint ; antennae long, filiform, smoke-brown, nearly 

 as long as the entire body and membrane of the wing-covers 

 conjoined, with the basal joint pale piceous, and the basal por- 

 tion of the third joint whitish. Pronotum much longer than 

 wide, the anterior lobe abruptly narrower than the base, cylin- 

 drical, black, slenderly and transversely wrinkled, posterior 

 lobe more minutely wrinkled, convex, the posterior margin very 

 slightly sinuated, with the humeral angles almost acute. Scutel- 

 lum red at base, black on the transverse impression, and pale 

 yellow on the apical lobe. Legs slender, rufo-piceous, or pice- 

 ous, the tibiae sometimes paler, posterior femora moderately 

 thick, feebly curved, a little compressed. Hemelytra dull black, 

 minutely pubescent, with a white band at the base of the cuneus, 

 the cuneus narrowly margined with whitish, and the costal 

 margin nearly straight ; membrane long, smoke brown. Abdo- 

 men dark, or black piceous, polished, narrow. 



Feb. 5, 1890. 



