4 University of Michigan 



terior edge relatively weak and short, shorter than the occiput 

 is long (distance from frons to posterior border of the occiput 

 about midway between the angle of the eye and the median 

 line). 



Prothorax black with some indefinite small yellow mark- 

 ings ; middle lobe with the posterior, inflated-like, transverse 

 area on either side entirely bluish gray. 



Dorsum of thorax rich brown to almost black with a pale 

 almost white stripe on either side, the inferior end of which is 

 more or less bluish gray ; these two dorsal pale stripes widely 

 divergent: no trace of a mesothoracic collar; side of thorax 

 lighter brown and bluish gray. Coxae light brown in front in- 

 definitely marked with i)aler, behind pale bluish gray ; under 

 parts bluish gray, passing to light brown posteriorly. 



Abdomen robust, seen from above largely dark brown or 

 black ; i brown at base, black apically ; 2 narrowly brown at 

 base, followed by a transverse bluish gray band extending to 

 and covering the auricles above, posterior half of segment 

 brown ; 3-5 black, each with a basal triangular bluish gray spot, 

 narrowly separated from the base, pointed posteriorly, extend- 

 ing three-fourths the length of 3, less than half the length of 

 4, and about one-fourth the length of 5 ; 6 and 7 black ; 7 with 

 the basal two-sevenths or one-third dull yellow, the pale color 

 continued indefinitely posteriorly in a thread-like dorsal line; 

 8 black or nearly so; 9 and 10 dark brown. Seen from the 

 side the inferior third of i is bluish gray ; 2 is brown with the 

 inferior posterior portion bluish gray; 3 is brown, shading to 

 black apically with a small obscure inferior basal bluish gray 

 spot ; the remaining segments are black with the basal pale ring 

 of 7 carried to the inferior margin. Sterna of segments 3-5 

 ending apically in a small narrow spine-like projection. No 

 ventral spine or tubercle on i. Superior appendages jet black 



