1865.] 115 



or less yellowish at base, sometimes obsoletely so; ;»ntennae black, the 

 flagellum piceous, paler beneath, especially at base and apex, the scape 

 often with a yellowish line in front. Thorax deeply and closely puac- 

 tured ; a spot on each side of the prothorax above, sometimes wanting, 

 a transverse line on postscutclluni, and sometimes a spot on each side 

 of the metathorax, yellow ; metathorax coarsely punctured or subru- 

 gose, the triangular space at base longitudinally, or slightly oblicjuely 

 striated, the tip of this space has sometimes a few very fine transverse 

 striae; tegulae testaceous, sometimes dusky, with a large yellowish spot 

 above or in front. Wings smoky-hyaline, with a moi-e or less deep vio- 

 laceous reflection, the marginal cell and apex fuliginous ; sometimes 

 the wings have a brassy reflection. Legs black ; tips of the femora 

 testaceous, sometimes fuscous; sometimes the posterior pair vary from 

 almost entirely yellow to almost entirely black, generally the apical 

 half is dull testaceous or yellowish-fuscous ; iu one specimen the inter- 

 mediate femora are entirely honey-yellow, except their extreme base ; the 

 tibife are yellow, sometimes tinged with fulvous, the posterior pair are 

 fuscous at tip within ; tarsi testaceous, the posterior pair entirely dusky 

 or blackish. Abdomen closely and rather deeply punctured, the seg- 

 ments strongly constricted at base; first segment with a yellow spot 

 on each side, sometimes reduced to a dot ; second segment with a broad 

 subapical yellow band, more or less narrowed in the middle anteriorly ; 

 the three following segments each with a continuous, narrow, subapical. 

 yellow band, broader laterally, sometimes the band on the fifth seg- 

 ment is nearly as broad as that on the second, and similarly shaped; 

 ventral segments with the apical half somewhat prominent and sub- 

 rugose, the basal half smooth and sometimes piceous or testaceous. 

 Length 5 J — 7 lines; expanse of wings \)l — 11 lines. 



M>il'\ — l')ift'ers by the face being entirely yellow; the antennae 

 longer, the scape always yellow in front, and the flagellum mostly 

 dusky fulvous or testaceous beneath ; the clypeus flat and covered with 

 sparse punctures ; one specimen only, has a transverse yellow line on 

 the seutellura similar to that on the postscutellum, and the metathorax 

 has a yellow spot on each side; the underside of the cox;\;, trochanters 

 and femora more or less, yellow ; the femora a^ove, except extreme 

 tips fwhioh are fulvous), and the apical half of the posterior pair 

 beneath, black, sometimes the latter have the basal half yellow ; tibiae 

 and tarsi much as in the female, but more yellowish, with the tips of 

 the posterior tibiae more or less dusky or blackish, sometimes the en- 

 tirely upper surface is dusky, and the base of their tarsi pale; the 



