UHLER ON INSECTS. 423 



with some small brown streaks. Buccalce orange-yellow : labrum 

 piceous or black, the rostrum extending to the base of the posterior 

 coxjB, bright yellow, with the tip or one or both of the last joints 

 piceous. Antenuiie dusky yellow or pale piceous; the basal joint thick- 

 est, jjiceous or black ; the second very long, palest, piceous at base and 

 tip ; third more slender, a little darker at tip, more than one-half as 

 long as the second ; fourth still more slender, shorter than the third, 

 but longer than the basal one. Pronotum wider than long, moderately 

 convex; the sides obliquely arcuated, not carinated; the outer angles a 

 little humped, and the surface adjoining postero-interiorly a little im- 

 pressed ; the posterior margin a little arcuated, the edge sharp, but 

 faintly decurved ; callosities bounded behind each by a brown, impressed 

 arc, and with a brown indented point in the center of each; the submar- 

 ginal surface frequently with a brown broad streak, or with a cloud and a 

 darker streak in the anterior angle; deflexed sides pale yellow, scabrous 

 and sericeous pubescent, generally with one or two brown spots (but 

 sometimes without them); sternum and pleurte more or less dusky, 

 pubescent. Legs and coxae yellow ; the femora a little darker, crossed 

 with two or three brown oblique bands, those of the posterior femora 

 darker and jagged ; sometimes with the knees a little brown ; tips of 

 tibine, two last joints of the tarsi, and the nails piceous. Scutellum with 

 the posterior part of the disk a little raised, sinuated each side, brighter 

 yellow, transversely wrinkled, the base brown in the middle and on 

 each side. Corium pale dull yellow, clearer on the costal area, golden 

 sericeous pubescent ; the clavus, except at base and a long cloud on the 

 disk extending to the apex, brownish ; cuneus red, excepting on its 

 margins, which are pale yellow ; membrane pale smoky, margined at 

 base and inward by a thickened fuscous edge, the inner continuation of 

 this edge yellow, base pale, the nervules pale yellow, with the smaller 

 areole sometimes dark brown. Venter yellow or reddish -yellow, pol- 

 ished, minutely pubescent, the disk with a large black area, and the 

 outer submargin with a series of short black lines running from the base 

 to the penultimate segment; the exterior margins of the posterior seg- 

 ments are oblique, and give the angles prominence, making the segments 

 appear serrate. 



Length to tip of venter 3-5 millimeters ; to tip of membrane 5-6 

 millimeters. Width of pronotum 2-2^ millimeters. 



Collected by me at Colorado Springs, while sweeping the weeds near 

 the Fountain Creek, August 16. 



It is a very variable and common insect in many parts of North 

 America, extending from Quebec to Southern Florida, thence west into 

 Texas and New Mexico. In Maryland, it may be met with from the lirst 

 of June till the end of October, and it lives upon violets, weeds, and 

 herbs in low grounds. I have found it in York County, also, in similar 

 situations, and upon Ambrosia. 



Specimens of both sexes occur with a few coarse and deep punctures 

 on the base of the head in front of the occipital carina, and very often 



