THR CANADIAN ENTOMOLOGIST. 169 



tapering anteriorly to head, stout posteriorly, coming suddenly to 

 a point at anal extremity. Transversely wrinkled, both above 

 and below. Consisting of thirteen segments, head chitinous, other 

 segments fleshy, the prothoracic segment hardly less so. Nearly 

 naked, clothed only with a few very sparsely distributed hairs, somewhat 

 more numerous on the prothoracic segment and head. Head semi-circu- 

 lar in outline from above, not retracted, narrower than prothoracic seg- 

 ment ; second, third, fourth, and fifth segments each successively wider 

 than its predecessor, and increasing at about the same rate ; segments 6 to 

 8 about same width, a little wider than 5 ; 9 to 1 2 narrowing successively, 

 each with greater rapidity than its predecessor ; 13 very small. Pro- 

 thoracic segment a little longer than head ; segment 3 (in wrinkled 

 condition of alcoholic specimens) about two-thirds length of second, the 

 following segments increasing very slightly to the somewhat greater length 

 of 6 to 9 ; 10 and 1 1 successively a little shorter ; 12 and 13 very short, 

 of about equal length, 13 bearing a blunt subbifid anal pro'.eg. All the 

 segments with a few short hairs on lateral edges, varying in number 

 usually from 3 to 5, second segment and head with more. Eyes repre- 

 sented by six prominent brown or blackish, often glistening, simple eyes 

 on each side of the head, four of them arranged in a transverse diamond 

 just posterior to antenna and a little removed inwardly from edge of 

 head ; the other two situated on edge of head, more separated, one 

 ventrad of the antenna and the other ventrad of the upper four. Antennae 

 small, situated in an excavation and somewhat sunken, 3-jointed ; first 

 joint stout, cylindrical, hardly as long as broad ; second joint less than 

 one-half the diameter of first, not as long: third joint nearly as wide as 

 second, hardly as long. Labrum twice as wide as long, front border 

 hollowed out, bearing two bristles on its dorsal surface, clypeus appear- 

 ing as a long transverse narrow strip posterior to labrum. Mandibles 

 stout, 5-toothed on the blunt apical portion. Maxillae well-developed. 

 Maxillary palpi 4-jointed, first joint short ; second a little shorter than 

 first, but nearly same diameter ; third longer than first, narrower than 

 second, cylindrical ; fourth conical, almost as long as third, not as wide 

 at base as third, and tapering evenly to a point. Labial palpi 2-jointed ; 

 basal joint stout, tubercular, hardly as long as wide, subcylindrical ; the 

 second joint conical, hardly as wide at base, and hardly longer than basat 

 joint. A spiracle (the mesothoracic) on lower anterior portion of third 

 segment ; 5 to 1 2 with a spiracle on lateral portion dorsad of the lateral 



