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COSSONUS 



57 



C. scrobicidatostriatus, the scutellum strongly transverse, the seriate punctures on 



the elytra more closely packed, the interstices straighter, the pro thorax more equally 

 punctate. 



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26. Cossonus micraspis, sp. n. (Tab. II. figg. 33, 33 a.) 



Elongate, somewhat convex, shining, black (the elytra rufo-piceous in one immature specimen), the tarsi and 

 the base of the antennae ferruginous. Head foveate and coarsely punctured between the eyes, the globose 

 basal portion almost smooth, the eyes not prominent; rostrum short, broadly, transversely, subquadran- 

 gularly dilated at the apex, narrowed towards the base, the basal portion sometimes shallowly canaliculate, 

 closely, rather coarsely punctate. Prothorax a little broader than long, deeply Insinuate at the base, 

 narrowed and feebly constricted in front, more or less rounded at the sides ; coarsely, closely punctate, 

 the punctuation becoming more diffuse and slightly finer on each side of the irregularly biseriate- 

 punctate, shallow, median groove, the latter terminating posteriorly in a large, triangular, rugose, shortly- 

 carinate excavation. Scutellum very small, narrow. Elytra usually wider than the prothorax, long, 

 subparallel ; closely and coarsely crenate- striate, the interstices rather convex, narrow, almost straight, 

 minutely uniseriate-punctate. Beneath somewhat closely punctate; ventral segments 1 and 2 very 

 slightly hollowed down the middle in the c? > unimpressed in the 2 . Anterior coxae separated by about 

 their own width. 



Length 4f-7£, breadth 1|-2| millim. ( <J $ . 



Hob. Mexico {Mas. Brit.), Omilteme and Xucumanatlan in Guerrero (H. H. Smith), 

 Las Vigas, Huitzo {Edge), Juquila in Oaxaca [Salle). 



Numerous examples, mostly from Juquila and Omilteme. This insect has long 

 been known in collections under the MS. name of Cossonus ambigenus, Chevr.*. 

 C. micraspis is the Mexican representative of the Costa Rican C. euryaspis, from which 

 it may be separated by the narrow (not transverse) scutellum, the more closely 

 punctured under surface, and the feebly excavate first ventral segment in the male. 

 From G. scrobicidatostriatus and C. perjidiosus (both of which have a small scutellum) 

 the present species may be known by the more closely punctured prothorax, the 

 abruptly dilated rostrum, the straighter elytral interstices, &c. 



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27. Cossonus rufonotatus, sp. n. (Tab. II. figg. 34, 34 a.) 



Moderately elongate, depressed, shining, nigro-piceous, the prothorax piceous down the middle, the elytra each 

 with an indeterminate transverse patch on the outer part of the disc at the base, a spot near the apex, 

 and the lower margin, from about the basal third to the tip, rufous, the tarsi and the base of the antennae 

 ferruginous. Head foveate, transversely grooved and sparsely punctate between the eyes, the globose 

 basal portion smooth, the eyes prominent ; rostrum more than half the length of the prothorax, curved, 

 strongly, transversely, quadrangularly dilated at the tip, the narrow basal portion longer than the apical 

 and gradually widened outwards, rather sparsely punctate; antennal club large. Prothorax slightly 

 broader than long, narrow, bisinuate at the base, narrowed and distinctly constricted in front, the 

 hind angles rather sharp; the disc with two deep, oblong, subtriangular, rugose, basal foveae, separated 

 by the smooth median ridge, the rest of the surface uneven and somewhat closely punctate. Scutellum 

 transverse. Elytra much wider than the prothorax, subparallel in their basal half, the humeri rather 



























* Not 0. ambiguus, Boh., an insect from an unknown locality (? Ceylon), the description of which will not 







apply to the present insect. 





Coleopt., Vol. IV. Pt. 7, December 1909. II 



