61 



r 



Stigmata nine pairs, the first, upon the mesothorax, very large, 



oblong, oblique, visible from below, the others on segments one 

 to eight of the abdomen, the first oval, half as large as the 

 mesotboracic, the rest small, circular. 



Legs slender, half as long as the body, increasing in length 

 posteriorly ; femora stout, anterior longest, flattened anteriorly ; 

 tibiae cylindrical, about as long as the femora ; tarsi cylindrical, 

 longer than the tibiae, the two joints equal in length, the termi- 

 nal slender, tapering uniformly, with two small apical hooks ; 

 legs, except the anterior femora, hairy, more densely on the 

 terminal joints. 



Femora of the fore legs with four strong, straight spines on the 

 anterior border, united at their bases and tipped with a bristle, 

 the three anterior subequal, the fourth smaller, the two anterior 

 closer together. Tibiae of fore legs obsoletely serrate pos- 

 teriorly, with four or five bristle-bearing denticulations. 



Length, exclusive of appendages, IT millimetres. 



Body very dark brown, opaque, having in life a bluish reflec- 

 tion as in the imago, the head and prothorax honey yellow, with 

 a faint brown patch in front of the eyes, and the first two joints 

 of the antennae more or less darkened, especially towards their 

 apices, the prothorax with a dark brown transverse band, deeply 

 tri-lobed posteriorly, divided by the median furrow, not quite 

 attaining the border on the sides, and covering the apical third. 

 The fore legs clear yellow, like the head and prothorax, the ter- 

 minal joint uniformly darkened, and the two preceding only 

 towards their apices. The remaining legs dark brown, testa- 

 ceous at the joints. The long first joint of the terminal 

 appendages clear yellow, the succeeding joints dark brown except 

 at their junction with each other. 



This description is made from three larvae preserved in alco- 

 hol, and the skin of a fourth from which the imago was raised, 

 none of which have the caudal appendages entire. They were 

 found in the latter part of July, at Detroit, Michigan, under the 1 

 loose bark of damp and rotten logs, where by the 16th of 

 August the pupae were found in unlined cells, formed by the 

 movement of the larv«*e. Two days later the imago appeared. 



On comparison with a larva from Kansas, probably of Cr. 



