Vol. XXviii] ENTOMOLOGICAL NEWS 211 



and widening slightly to form a biconcave arch above their bases. The 

 black also projects on each side as slight points along the eyes. Re- 

 mainder of the frons, the face and cheeks entirely wax yellow, shining, 

 or, rarely, the cheeks and jowls slightly infuscated or even entirely 

 blackened. The anterior mouth edge sometimes narrowly blackish and 

 more or less infuscation on the facial tubercle but not forming a 

 definite stripe. Posterior orbits densely pollinose and pilose; with 

 somewhat flattened silvery white pile on lower half, infuscated and 

 with delicate brownish yellow pile above. Pile of vertex black, that of 

 fions mostly pale yellow, delicate. The face nearly bare a few very 

 short delicate pale yellow hairs. Cheeks long yellow pilose. Antennae 

 of the same color as the face, the third segment rounded, about as 

 deep as long, the upper and distal parts more or less infuscated ; the 

 first and second segments entirely pale yellow with minute stiff black 

 hairs especially on the upper side. Arista brownish, bare, somewhat 

 thickened on the basal third. 



Face in profile (Plate XVI, Fig. F) prominent, slightly concave from 

 antennae to tubercle and again slightly constricted before the mouth 

 edge. On lower part produced forward about half the width of the 

 eye. Anterior mouth edge not equaling the tubercle. 



Thorax brownish black, moderately shining, with two faintly whitish 

 pollinose, narrowly separated stripes, obsolete behind. The lateral mar- 

 gins broadly and brightly yellow on humeri and to the suture, thence a 

 little less brightly but still distinctly yellowish to the scutellum. Pleurae 

 with the usual distinct yellowish spots on the prothorax, meso- and 

 meta-pleurae and on the upper parts of sterno- and ptero-pleurae. 

 Scutellum, plumula, squamae and halteres entirely yellowish. Pile of 

 the dorsum yellow, fine, moderately abundant; the lateral margins, the 

 scutellum, and more or less of pleurae with delicate pale yellow pile. 



Abdomen black, rvith doubly interrupted yellow fasciae, moderately 

 shining, the lateral margins continuously yellow. First segment metal- 

 lic shining, the lateral margins broadly and a very slender line on the 

 anterior margin yellow. Second, third and fourth segments each with 

 an arcuate, yellow crossband, which is completely or nearly interrupted 

 on each side about a third of the way from the lateral margin to the 

 middle line. The lateral parts of the arcuate bands consist of more or 

 less prominent angular projections antero-mediad from the lateral mar- 

 gin. Fifth and sixth segments each with an interrupted, arcuate yellow 

 band, the halves resolved into somewhat hammerlike yellowish spots. 

 Sometimes these segments all yellowish except a median spot and one 

 on each side blackish. Narrow posterior margins of third to fifth seg- 

 ments yellowish. Remainder of abdomen and the venter all yellowish. 



Legs including the coxae and trochanters pale yellowish with fine 

 black hairs on femora and hind tibiae and tarsi; on the coxae long pale 



