12 Mr. F. P. Pascoe on some new or Uttle-lcnoivn 



thickened but shorter, the third as long as the first, the remainder to 

 the eighth shorter and more or less transverse, the three last forming an 

 ovate, compact club ; maxillary lobes narrow, fringed ; mentum sub- 

 quadrate, rounded in front ; labium transverse, narrower behind ; ter- 

 minal joint of the maxillary palpi ovate-triangular, of the labial ovate, 

 obtuse ; prothorax somewhat quadrate, but with the sides contracted in 

 the middle, produced at the anterior and slightly emarginate at the 

 posterior angle, the margin rather dilated, especially anteriorly, and 

 serrulate, the disk finely granulated; an elevated line on each side, 

 which are nearly parallel in front, then slightly diverging, after which 

 they approach to form a V-shaped mark, without however becoming 

 connected, each then encloses a lozenge-shaped cavity and terminates at 

 a short distance from the base ; outside the line the prothorax is rather 

 concave, with a slight ridge posteriorly; elytra with five strongly 

 marked costae, the intervals broad, with a double row of coarse punc- 

 tures ; body beneath dark chestnut-brown, reticulate-rugose ; legs 

 rather slender; tibiae gradually thicker towards the extremity and 

 slightly spurred ; tarsi short, the first three joints nearly equal. Length 

 2-3 lines. 



Kematidium [Colydiidfe], 

 Erichson, Naturg. der Ins. Deutschl. iii. p. 275. 



Nematidimn mustela. (PL III. fig. 10.) 



N. ferrugineum ; capite antice subdepresso ; elytris striato-punctatis. 



Hub. Rio; Para. 



Linear, elongate, ferruginous; head finely punctured, moderately 

 convex, somewhat flattened in front, the eyes rather large, black ; pro- 

 thorax half as long as the elytra, finely punctured, the sides slightly 

 incurved ; scutellum small, roimded ; elytra striate-punctate, the in- 

 tervals also punctured mostly in an irregular row ; body beneath finely 

 punctured ; legs luteous testaceous. Length 2|-3| lines. 



I have no hesitation in considering the insect just described a 

 Nematidmm, a genus founded on the CoJydium cylindricum, Fab., 

 and which, but for the expression " elytris Icevissimis,''^ might have 

 been identical, so far as his short description goes. "WTiether the 

 Nematidium costijpenne, J. du Yal, really belongs to the genus is, I 

 think, doubtful. I have another Nematidium among Mr. Bates's 

 Amazons Colydiida) *, which differs from the above principally in 

 its more slender form, shorter and more convex head, and elytra 

 more than twice as long as the prothorax. Like Colydium, the first 

 abdominal segment is nearly as large as the succeeding one. My 

 description is drawn up from the largest of the two specimens now 

 before me, which is from Pio, and belongs to Mr. Fry. 



* The Colydiidse of this collection will form the subject of a distinct paper. 



