COSSONUS. 



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more elongate prothorax than his B '. puncticollis (= xylophilus, Boh.). Both live 

 under the bark of pines. One of Wollaston's types of B. minor is figured. 





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11. Cossonus xylophilus. (Tab. II. figg. 21, 21 a.) 



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Cossonus xylophilus } Boh. in Schonh. Gen. Cure. iv. p. 999 \ 

 Borophlaus puncticollis, Woll. Trans. Ent. Soc. Lond. 1873, p. 627 2 , 

 Cossonus puncticollis, Sturm, in litt. (nee Boh.). 







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Bab. Mexico 12 {Salle, ex coll. Sturm; Truqui, Mus. Brit.), Ciudad in Durango, 





Las Vigas, Arnecameca, Jalapa, Oaxaca (Hone), San Andres Chalchicomula, Orizaba 







(Salle), Tenango del Valle (Richardson), Cuernavaca (Flohr), Michoacan (Herrera, in 



U.S. Nat. Mus.), Uruapan (Beam, in U.S. Nat. Mus.) ; Guatemala, Quiche Mts. 



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Sent in numbers from Las Visas. An elongate, somewhat depressed form, with 

 prominent eyes, a subquadrate, faintly impressed prothorax, and long, parallel, closely 

 crenate-striate elytra, the prothorax moderately bisinuate at the base and in some 

 specimens (as in the type of C. xylophilus) considerably narrower than the elytra. 



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The first ventral segment of the male is broadlv flattened down the middle. The 



Tenango examples are marked as having been found under pine-bark. Boheman's 

 type is figured. 





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12. Cossonus guatemaltecus, sp. n. 



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Moderately elongate, flattened above, shining, black or piceous, the base of the antennae and the tarsi 







ferruginous. Head longitudinally foveate and closely punctate between the eyes, the globose basal 

 portion almost smooth, the eyes prominent; rostrum very short, transversely, quadrangularly dilated at 

 the apex (in one of the Zapote specimens faintly canaliculate between the points of insertions of the 





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antennae), the two portions about equal in length, closely, finely punctate. Prothorax slightly broader 



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than long, very gradually or arcuately narrowing from a little before the base to the transverse subapical 

 constriction, the base feebly bisinuate ; somewhat finely and not very closely punctate, except along the 

 smooth median line, the latter subcariniform at the base and sometimes bordered with a few coarser 

 punctures, the disc flattened, but without definite basal excavation. Scutellum small. Elytra moderately 

 long, subparallel, very little wider than the prothorax; somewhat finely punctate-striate, the interstices 



almost flat. Beneath sparsely, finely punctate ; ventral segments 1 and 2 rather broadly excavate down 



the middle in the <$ . 

 Length 2|-3f , breadth f-l T V millim. ( 6 $ .) 







Hah. Guatemala, Zapote and San Geronimo (Champion). 





Five examples. Smaller and less elongate than C. xylophilus, the puncturing of the 











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prothorax and elytra not so coarse, the dorsal interstices of the latter flat, the rostrum 

 a little narrower at the base, the ventral excavation of the male long and deep. The 

 non-excavate base of the prothorax, &c., separate the present species from C. exaratus, 



impressus, and various other small forms. More depressed than C. depressicollis, the 



disc of the prothorax somewhat finely, subequally punctate. 



biol. centr . - amer . , Coleopt., Vol. IV. Pt. 1, Becembcr 1909. HH 



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