52 University of Michigan 



at base and at the outer posterior angles ; f rons pale in front, 

 with a median dark area and dark along the angle ; head above 

 variable, due to darkening with age ; in even the darkest 

 specimens there are three small pale areas, one in front of 

 the median ocellus on or near the suture between frons and 

 vertex, and one on either side of the median ocellus, not 

 touching the ocellus and extended laterally only to the level 

 of the antenna, the remainder of vertex and frons above 

 black; if a curved line be drawn from either side, beginning 

 at the outer extremity of the pale area on either side of the 

 median ocellus, and curving backward and inward to meet on 

 the median line just anterior to the occipital crest, the roughly, 

 semicircular area enclosed is that in which the black is re- 

 duced in less mature specimens ; this reduction is most con- 

 spicuous between and posterior to the lateral ocelli, this area 

 becoming largely reddish brown in some specimens. First 

 joint of antenna black in front; second and third joints light 

 brown, more or less darkened in older specimens, especially 

 on the inner face of the second joint and the apex of the third ; 

 remainder brown. Profile similar to figure 64. 



Prothorax bright yellow, conspicuous; the front and hind 

 borders black, the latter widened at the lateral extremities 

 and with a large median black spot the length of the hind 

 lobe, or the hind lobe may be black with a yellow anterior spot 

 on either side, or entirely black; a short longitudinal median 

 thread of black on the middle lobe. Propleuron bright yellow, 

 only slightly paler than the middle lobe. 



Thorax rather dull colored, black above; on either side of 

 the black middorsal stripe is a dingy wdiite stripe often slight- 

 ly more than half as wide as the middorsal black, but some- 

 times reduced to a line ; an antehumeral pale, yellowish tinged 

 stripe, about as wide as the dorsal pale stripes, widened on 



