142 ACADEMY OF NATURAL SCIENCES 



beneath subglabrous : [242] tarsi elongated, anterior ones as 

 long as tbe femora and tibia conjunctly : nails armed with a 

 strong tooth near the base. 



Length nine-twentieths of an inch. 



It is probably rather rare. The form of the body is cylindri- 

 cal and elongated ; the tarsi are remarkably elongated. 



[A Lachnosterna. — Lec] 



2. M. LANCEOLATA. — Above with small lanceolate hairs or 

 scales : beneath hairy. 



Inhabits Missouri and Arkaasa. 



Body short, suboval, black or reddish-brown ; nearly covered 

 above with small lanceolate cinereous scales, which arise from 

 impressed punctures : clypeus slightly emarginate, edge reflected : 

 thorax a little dilated each side before the middle into a rounded 

 angle ; posterior angles acute ; lateral edge slightly crenated : 

 scutel rounded at tip : elytra with minute elevated points between 

 the scale-like processes ; from two to four obsolete, subglabrous 

 lines : pectus and postpectus downy : venter in the male, having 

 a compressed tubercle on the centre of each of the three middle 

 segments, and the penultimate segment much indented: nails 

 one-toothed near the base. 



Length three-fifths of an inch. 



This insect is very short in proportion to its thickness ; and 

 the remarkable character of the compressed tubercles on the 

 venter of the male readily distinguish it from other species. I 

 found this species near the Rocky Mountains. [243] 



[Belongs to Lachnosterna ; was made the type of a distinct 

 genus, Tostegoptera Blanchard — Lec] 



3. M. HIRSUTA. — Castaneous, hairy ; hair disposed in lines on 

 the elytra. 



Inhabits the United States. 



M. hirsuta Knoch in Melsh. Catal. 



Head hairy; punctures dilated, crowded, confluent; anterior 

 edge emarginate, slightly reflected : thorax hairy : punctures di- 

 lated large, irregular, confluent, with slightly elevated centres, 

 each furnishing a rigid hair : lateral edge minutely crenate, di- 

 lated in the middle : scutel punctured each side, rounded at tip : 

 elytra minutely rugose ; hair disposed in five or six longitudinal 



[Vol. III. 



