1 8 University of Michigan 



in the fork of the carina below ; on either side of this median 

 black stripe a more or less distinct yellow stripe of about equal 

 width; a wider and clearer antehumeral stripe; between these 

 two pale stripes the mesepisternum is yellow, darkened with 

 brown shading to a very variable degree, so the dorsum may 

 appear largely yellow, or, at the other extreme, almost black; 

 in every case the dark area is most developed above and along 

 its outer border; the antehumeral yellow stripe runs straight 

 across the mesinf raepisternum ; above it becomes posthumeral 

 and occupies the upper end of the mesepimeron, which other- 

 wise is largely black ; the dark area is carried across the niesin- 

 fraepisternum which latter below, and the lower and posterior 

 portion of the mesepimeron are yellow ; metepisternum yellow 

 with a black or brown stripe, starting near the upper end and 

 passing through the stigma to the coxa ; metepimeron paler 

 yellow than the two anterior sclerites, sometimes with a small 

 dusky area above. Beneath and coxae yellow. 



Abdomen above largely dark, 4-7 and 9-10 the darkest; i 

 pale dull yellow, darker in the median line and apically; 2 

 brown, a long rounded median basal yellow spot, darker basally 

 on either side of this spot ; 3 brown, a yellow basal ring and a 

 black apical one of about the same width, a very narrow pale 

 middorsal line continuous with the basal ring, varying from 

 about one-third the length of the segment to, but not dividing, 

 the apical black ring; an obscure but evident subapical pale 

 area ; 4-7 similar, black replacing the brown and the middorsal 

 longitudinal pale line absent ; 8 dull orange yellow, obscure at 

 the base and narrowly black ringed apically; 9 and 10 black. 

 Seen from the side i is largely dull yellow, an inferior poster- 

 ior marginal black spot; lower half of 2 yellow, the inferior 

 border black edged; 3-8 with the dorsal colors and pat- 

 tern carried onto the sides ; 9 dark obscure orange at base be- 



