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50 



EHTNCHOPHOEA. 



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13. Cossonus subcarinatus, sp. n. 



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Moderately elongate, flattened above, shining, black or nigro-piceous, the tarsi and the base of the antenna 

 ferruginous. Head foveate and closely punctate between the eyes, the exposed basal portion faintly 







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punctured, the eyes prominent ; rostrum short, feebly, transversely, quadrangularly dilated at the apex, 



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the two portions about equal in length, closely punctate. Prothorax a little broader than long, moderately 

 rounded at the sides (or subobliquely narrowing forwards) to the distinct transverse subapical con- 

 striction, feebly bisinuate at the base ; closely, rather coarsely punctate, the disc triangularly flattened 

 posteriorly, and with an irregular row of coarser punctures along each side of the smooth, narrow, 

 incomplete median line. Scutellum very small. Elytra moderately long, subparallel, flattened 

 anteriorly; closely crenate-striate, the interstices obsoletely uniseriate-punctate, narrow, and feebly 

 convex. Beneath rather closely punctate ; ventral segments 1 and 2 depressed down the middle in 



the c? • 



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Length 3|-4|, breadth ly^^-F roillim. 



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Hah. Mexico (Solari, ex Hbge). 







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Five specimens. This is a form of C. guatemaltecus with the prothorax and elytra 

 more strongly, and the under surface more closely, punctate, and the rostrum a little 

 less dilated at the tip. It is less elongate and more depressed, and has a narrower 



rostrum, than C. xylophilus. The less elongate prothorax, more depressed form, and 

 narrower rostrum also separate C. subcarinatus from C. crenatus and C. corticola. 

 The specimens are labelled as from " Sierra de Durango," but no reliance can be placed 



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on that locality. 



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14. Cossonus carinifer, sp. n. 



Elongate, somewhat convex, shining, black, the base of the antennae and the tarsi ferruginous. Head rather 



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small, deeply foveate and closely punctate between the eyes, the globose basal portion almost smooth, 

 the eyes feebly convex ; rostrum short, quadrangularly dilated at the apex, the basal portion slightly 

 longer than the apical, finely punctate. Prothorax oblong, somewhat obliquely narrowed from near the 

 base to the faint subapical constriction, the base feebly bisinuate ; coarsely, closely, unequally punctate, 

 the disc slightly depressed and subcarinate down the middle, the carina becoming sharply defined 

 posteriorly and the depression widening out into a shallow, triangular, punctured area. Scutellum very 

 small. Elytra not or very little wider than the prothorax, parallel, flattened on the disc anteriorly ; 

 closely crenate-striate, the striae becoming broader and deeper and the punctures larger towards the 

 base, the interstices faintly uniseriate-punctate, narrow, and more or less convex. Ventral segments 

 1 and 2 narrowly depressed down the middle in the S • 

 Length 3|-5, breadth l-^jp- 1| millim. 



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Hob. British Honduras, Rio Sarstoon (Blancaneaux). 



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Five specimens ; a sixth from the same locality seems to belong to the same species, 

 but it has the prothorax more convex and unimpressed and the eyes somewhat 

 depressed. This insect is related to C. xylophilus, C. crenatus, and other pine-bark 

 forms, differing ^from most of the allied Centra] -American species in its distinctly 

 longer rostrum, the basal portion of which is considerably narrower than in 

 C. xylophilus. The short longitudinal carina at the base of the prothorax is sharply 



defined, as in the N.-Ameriean C. impressifrons, Boh., a species unknown to me, but 

 apparently different from C. cariwfer. 



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