











62 



EHTNCHOPHOEA. 









36. Cossonus exaratus. 



Oossonus exaratus, Boh. in Schonh. Gen. Cure. iv. p. 1018 \ 

 Var. Cossonus rufescens, Chevr. in litt. 2 



■ 



cJ . Ventral segments 1 and 2 broadly excavate down the middle. 



Hab. Mexico 12 (Truqui, in coll. Fry; Mus. Brit.), Toxpam (Salle), Las Vigas 

 (Hoge), Motzorongo (Flohr), Teapa (H. H. Smith) ; Guatemala, near the city, Capetillo, 

 Zapote (Champion). 



■ 



A small form, with a deep, oblong frontal fovea, somewhat prominent eyes, a rather 

 small prothorax — which is sharply, longitudinally carinate down the middle of the 

 triangular, rugose, basal excavation and somewhat diffusely punctured on the disc, 

 and closely crenate-striate elytra, the ventral segments 1 and 2 deeply excavate down 

 the middle in the male. Found in numbers at Guatemala city and Capetillo, the 

 males from these places agreeing with the type ( S ) belonging to the Stockholm 

 Museum. The Mexican specimens vary a good deal inter se, some of them having the 

 elytra rufescent (rufescens, Chevr.) as in typical C. impressus. 



■ 



37. Cossonus convexiusculus. 



Cossonus convexiusculus, Boh. in Schonh. Gen. Cure. iv. p. 1007 \ 



Hab. Mexico (Edge, ex coll. Solari), Orizaba (Mus. Chevr olat ] 



It is somewhat doubtful if the specimen of this species communicated by Dr. Sjostedt 

 is the actual " type " ; it seems to be a variety of C. exaratus with the prothorax more 

 closely punctured on the disc, a little less depressed in the middle at the base, and the 

 short basal carina abbreviated anteriorly. Boheman compared C. convexiusculus with 

 the N.- American C. concinnus *, and in Scbonherr's work it is placed in a different 

 section (z=Borophloeus, Woll.) of the genus from that including C. exaratus. A single 

 example given us by Signor Solari agrees very nearly with the Mexican insect (which 

 is not labelled with anv definite locality) sent me from Stockholm. 



38. Cossonus purulensis, sp. n. 



Elongate, depressed, shining, Mack, the hase of the antennae and the tarsi more or less ferruginous. Head 

 finely punctate and feebly foveate between the eyes, the globose basal portion obsoletely punctate, the 

 eyes rather prominent; rostrum short, quadrangularly dilated at the apex, the apical and basal portions 

 about equal m length, the latter obsoletely canaliculate anteriorly, sparsely, finely punctate. Prothorax 

 slightly broader than long, somewhat rounded at the sides, gradually and obliquely narrowing from near 

 the base, the latter rather feebly bisinuate, the subapical constriction indistinct ; sparsely, unequally punc- 

 tate, the punctures coarse and irregularly distributed on the disc along each side of the smooth median 

 line, the latter flattened and cariniform at the base and limited externally by a short shallow, transverse, 

 rugose space. Scutellum small, transverse. Elytra a little wider than the prothorax, subparallel in their 

 basal half ; closely crenate-striate, the interstices straight, obsoletely uni seriate-punctate, about as wide 

 as the strise, and feebly convex. Ventral segment 1 broadly hollowed down the middle in the 6 . 



Length 3|-8g, breadth 1-1^ millim. ( tf .) 



C. concmnus, Boh., does not appear to have been correctly identified by American authors, to judge from 



the specimens sent me under that name. 







■ 























■ 













































■ 

















■ 





■ 



■ 

































