









- 







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56 



EHYJS T CHOPHOEA. 







24. Cossonus perfidiosus. (Tab. II. figg 









rfid 



Boh. in Schonh. Gen. Cure. iv. p. 1016 ! 3 Faust, Stett. ent. Zeit. 1896, 



P 



133 2 . 





Cossonus curvatus, Chevr. in Mus. Brit. 



Hab. Mexico 3 (Hog 



Solari), Toxpam (St 



B 



Honduras (Bl 



aneauoc) ; Nicaragua (Mus. Brit., Salle), Chontales (Janson) ; Costa Rica, Valle de ] 



(Pittier), Machuca and Surubres, Pacific slope (Biolley) ; Panama, Volcan de Chii 

 (Champion). — Venezuela, Caracas, La 





Guay 



San Esteb 





The thirty-five specimens from our reeion h 



eferred to C. perfid 



■ 



(including 



about a dozen from Machuca), tt 

 extremely like the smaller exampl 



\ 



f which I have not seen, are 



f C\ scrobi cidatostriatiis. differ 



5 



from th 



in 



g 



ghtly 



more rugose, 



ly carinate rostrum, and the seriate 



punctures on the elytra not so larg 



pt at the base, where they 



often sub 















' 



. 























































■ 















quadrate) and more crowded, the interstices becoming very narrow, sinuous, and 

 costate anteriorly. The absence of definite polished spaces on the disc of the prothorax 



the shorter and 



G. lebasi 



gose rostrum separate C. perfidiosus from C. f 





d the comparatively broader, more convex form, the sub 



rostrum, 





■ 









d more closely placed punctures 



the elytra distinguish it fro 



guildingi. A large female from Toxpam (length 7 mm.) 



somewhat depressed 





castaneous elytra, and two distinct almost impunctate spaces on the disc of th 



prothorax, 



belong here. The other examples vary from 3 



4 

 5 





mm 



gth 



A Machuca specimen is figured, but it is not so broad as represented 







■ 







. 





2 



Cossonus euryaspis, sp. n. (Tab. II. figg. 32, 32 a.) 



Elongate, somewhat convex, shining, black or piceous (immature), the tarsi partly or entirely ferruginous. 

 Head deeply foveate and coarsely punctured between the eyes, the globose basal portion almost smooth, 

 the eyes not prominent ; rostrum short, broadly, transversely, subquadrangularly dilated at the apex, 

 narrowed towards the base, closely, rather coarsely punctate. Prothorax a little broader than lon^ 



. 



■ 







sparsely punctate ; ventral segments 1 and 2 somewhat deeply ( $ ) or shallowly ( 2 ) excavate down the 

 middle. Anterior coxse separated by less than their own width. 



Length 5i-9, breadth 14-3 millim. 



$ 







deeply Insinuate at the base, narrowed and constricted in front, the sides moderately or strongly rounded • 

 coarsely, closely, unequally punctate, the punctuation becoming more diffuse on the disc, the latter with 

 a large, deep, rugose, shortly-carinate, triangular excavation at the base which is continued shallowlv 

 forwards to near the apex. Scutellum strongly transverse, smooth. Elytra elongate, usually wider than 

 the prothorax, subparallel ; coarsely and closely crenate-striate, the interstices narrow, more or less 

 convex (especially towards the base), almost straight, obsoletely uniseriate-punctate. Beneath rather 



L 











Hab. Costa Eica (Rogers), La Palma, Tarbaca, Tablazo, Volcan de Barba, 1500- 

 1700 metres (Biolley\ Irazu (U.S. Nat. Mus.). 



Sixteen specimens, varying greatly in the development of the prothorax 





tnmid 



„ <_, , - L ,.- ■ .. (as is the 



many Cossonids), the sides being sometimes strongly rounded and the disc 



each 



of the 



dep 



More elongate and less convex than 



































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. 











y , 





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 ■ 



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■B 



