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4 



HOMALOSTTLUS.— KHODOILENUS. 119 



4. Homalostylus subcylindricus, sp. n. (Tab. V. figg. 34, 34 a, <j .) 



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Elongate, rather narrow, somewhat cylindrical, opaque, black more or less variegated with fusco-ferruginous 



(the c? ferruginous above, with the prothorax black at the sides and down the middle, and the elytra 



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each with four black patches — three, oblique, along the sides, and one, subtriangular, on the disc near the 

 suture, at about the middle) ; pruinose, the scattered punctures each surrounded by a rather large, rounded, 

 brownish-cinereous spot, the spots along the suture of the elytra distant one from another. 'Rostrum 

 feebly curved, stout, somewhat compressed, very little widened basally, coarsely, rather closely punctate 

 to near the tip, in the S much shorter than the prothorax, in the § considerably longer and with the 



apex smoother. Eves narrow. Antennal scape about as broad as the anterior tibia in both sexes, 

 subequal in width throughout. Prothorax about as long as broad, gradually narrowed anteriorly, feebly 

 bisinuate at the base, sparsely punctate. Scutellum small, depressed, triangular. t Elytra oblong, very 

 little wider than the prothorax, finely punctate-striate, the interstices each with a row of scattered 

 punctures. Pygidiura conical, sparsely punctate. Ventral excavation of the c? deep, extending from bhe 



front of the first segment to far beyond the middle of the metasternum. Prosternum considerably 

 developed at the base. Femora with a row of scattered hairs beneath. 

 m " 10-12, breadth 3-34- millim. ( tf $ .) 





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Hob. Guatemala, Duefias [Champion: 6 ), Trece Aguas in Alta Vera Paz (U.S. Nat. 







Two specimens, evidently sexes of the same species, which is distinguishable by the 

 moderately dilated antennal scape in both sexes, the feebly dilated basal portion of 

 the rostrum, and the subcylindrical form of the body. //. subcylindricus superficially 



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resembles Rhodobmius variequttatus and its allies. 



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L L L 





RHODOB^NUS. 



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Rho dob anus, Leconte, Proc. Am. Phil. Soc. xv. p. 332 (1876) ; Chevrolat, Ann. Soc. Ent. Fr. 









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1885, p. 275. 



This genus, based upon Curculio 13-punctatus, 111., and Sphenophorus pustulosus, 



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Gyll., both common N.-x\merican insects, has its headquarters within our limits, whence 



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about fifty species are now recorded. Its chief characters are: — The narrow peduncle 



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of the submentum, usually with a tooth or compressed prominence in front, or at the 



least in the $ ; the gradually widened antennal scape ; the subcontiguous 







anterior coxa3 ; the narrowly separated intermediate coxae ; the subcorneal antero- 



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intercoxal process of the metasternum ; the unarmed outer apical angle of the tibiae ; 







the broad, spongy-pubescent third tarsal joint; and the more or less velvety, pruinose, 



or spotted upper surface of the body. The femora and tibiae are similarly ciliate in 

 ' two sexes ; but the males may generally be known by the hollowed first ventral 



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segment (the depression sometimes with a compressed tubercle or short ridge in the 

 middle or towards the anterior margin, or broadly extending forwards along the meta- 

 sternum), and the females by the angular or dentiform prominence on the peduncle of 

 e submentum (this being usually less conspicuous or wanting in the male, except in 



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B. mesomelas and a few other species) and the smoother (and often longer) apical portion 

 biol. CENTR.-AMER., Coleopt., Vol. IV. Pt. 7, April 1910. BR 



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