HENRY L. VIERECK. 399 



9 ■ — 12 mm. — Head. — Eyes as in decorns, that is converging toward the clypeus' 

 the distance between the eyes at the base of the clypeus being one-half or nearly 

 one-half as great as the distance between the eyes'along an imaginary straight 

 line drawn from eye to eye and through the center of the posterior ocelli ; front 

 with fine, sparse punctures, some of which are as much as .5 mm. apart; clypeus 

 nearly twice as broad as long, yellow, convex, indistinctly punctured, more 

 sparsely so than the front and with a dimple near the center; that portion of the 

 face which lies between the eyes, clypeus and insertion of the antennae is yel- 

 low ; antennae thicker beyond the middle than before, scape easily twice as thick 

 as the first joint of the flagel and as long as or nearly so as the first joint of the 

 flagel and pedicel, yellow, flagel pale brown, its first joint a little longer than the 

 second, pedicel concolorous with the flagel, mandibles black at tip, yellow at base 

 and brown between. 



Thorax. — Smooth, polished, dorsum appearing dullish, apparently on account 

 of the presence of an indefinable pubescence, pronotum, tegulae, posterior and 

 anterior margins of the propleura, mesonotum with a yellow margin laterally, 

 anterior and inferior aspects of the mesothorax separated from each other by an 

 arcuate channel that originates approximately .5 mm. posterior to the posterior 

 margin of the tegulae and extends as one continous channel, which almost 

 attains the channel between the nieso- and metapleura, the latter have a large 

 mark which occupies nearly all of the anterior half of its lateral aspect; meso- 

 sternum with a median furrow along which there is an indistinct ridge, other- 

 wise much the same as the dorsulum ; a little more than the posterior half of the 

 scutel, and the posterior two-thirds of the postscutel yellow ; metathorax smooth 

 and pubescent in much the same way as the mesothorax, a fork-like impression 

 extending from the inferior portion of the posterior aspect of the metathorax to 

 the middle of the postscutel, laterally the prongs of this fork extend from the 

 center or near the center of the metathorax to a point on a line with the poste- 

 rior interior point of the wing insertion, the diverging impressions forming the 

 enclosure, which is bisected by the prolongation of the median impression, all the 

 impressions slight, except the posterior half of the longitudinal one; tibife and 

 tarsi spinose ; wings strongly brownish-yellow, excepting the apical fourth which 

 is mostly pale and more of a yellowish hyaline color than the marginal cell 

 which in turn is fuscous, stigma brownish testaceous, nervures brownish, except- 

 ing those of the basal half of the wing which incline testaceous, a little more 

 than the posterior two-thirds of the postscutel and of the posterior half of the 

 scutel, an almost oval spot on each side of the metathorax taking up nearly all 

 of its surface and leaving only a margin of black externally and internally and 

 not encroaching upon the enclosure, yellow, legs mostly brownish-yellow, coxae 

 black, trochanters, basal and posterior portions of the posterior femora more or 

 less dark brown ; pulvilli brownish. 



Abdomen. — Smooth and shining and pubescent in much the same way as the 

 thorax, mostly yellow, lateral margins of the first ventral segment black, on the 

 second ventral segment there is an almost tongue-shaped dark brown mark 

 which extends from the base to a median circular apparently bronzy space near 

 the apex, the succeeding ventral segments excepting the apical one are brownish 

 to blackish at base, first dorsal segment with a median brownish line on the an- 

 terior half and a narrow almost blackish border posteriorly, the three succeeding 

 dorsal segments have a blackish margin at base beyond which the second seg- 



TBANS. AM. ENT. SOC. XXXIII. JANUARY, 1908. 



