126 [January 



on the back, flattened on the ventral side; glabrous, smooth and shining; 

 consistence horny; color of the dorsal segments (thoracic and abdominal), 

 except a narrow border on the posterior margin which is paler, dark brown, 

 almost black, with two large, rounded, ferruginous-red spots on each ; in 

 two of my specimens (both from Prairie mer rouge), these spots, occupy- 

 ing the sides of the dorsal segments, leave a broad brown band between 

 them; in the third specimen they are much larger, and although the brown 

 space still exists on the thoracic segments, it becomes almost obsolete on 

 the abdominal ones, where the two spots gradually coalesce towards the 

 end of the body, so that the sixth and seventh abdominal segments may 

 be described as being ferruginous above with a brown margin, running all 

 round ; on the ninth and last segment, the brown stripe is again more ap- 

 parent, although the remainder of the segment, except the two anterior 

 corners, is ferruginous. The anterior corners of the first thoracic segment 

 are yellowish. 



H((id horizontal, inserted in the first thoracic segment as far as the 

 basis of the antennae, flat, irregularly rugose above, dark brown, except 

 the softer parts of the mouth and tubercles bearing the antennae, all of 

 which are paler. 



Antennse a little shorter than the mandibles, inserted on a fleshy tuber- 

 cle just behind the root of the latter, 3-jointed ; first joint subcylindrical ; 

 second joint a little longer than the first, somewhat thickened towards the 

 tip ; third joint at least twice narrower than the tip of the second, not 

 much longer than broad, ending in an obtuse point; its tip seems to be 

 separated from it by an articulation, thus representing perhaps a rudimen- 

 tary fourth segment; the two first segments are brown, their tip brownish- 

 yellow; the tubercle, on which the antenna is inserted, as well as the third 

 joint are brownish -yellow. 



Ocelli one on each side, behind the basis of the antennae. 



The upper horny disc of the head is limited anteriorly, in the middle 

 of the space between the roots of the mandibles, by a bisinuated margin, 

 in the shape of a flat W, from each of the two sinuses of which protrudes 

 a small, fleshy tubercle ; just before the tubercles, and closely applied to 

 both, is a similar fleshy, but paler and more transverse piece. Although 

 the epistonia is not separated by a distinct suture, I am inclined to take 

 cither these three fleshy pieces, or the two first alone, for the labrum ; in 

 the latter case the third transverse piece would l)e merely a protruding 

 soft inner })art of the mouth. 



M((n<Iil>J<i^ free ( not covered by other jiarts of the mouth), falcifbrni, 

 elongated, narrow, slightly and uniforiiily curved, pointed at tip. perfectly 



