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MESOCOEDYLTJS.— YITCCABOKUS. 175 





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Eab. British Honduras, Rio Sarstoon (Blancaneaux) ; Nicaragua, Chontales (Belt, 

 Jansori) ; Costa Rica, San Carlos (U.S. Nat. Mus.); Panama (coll. Pascoe).— Colombia, 

 Buenaventura (Rosenberg) ; 1 Peru. 





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Numerous examples of this insect have been obtained from Chontales, and it differs 

 nstantly from M. bracteolatus as stated above, the rostrum in the latter being 



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conspicuously raised or carinate down the middle towards the base in both sexes. 

 The allied M. rugicollis and M. cylindraceus (Boh.) are described as having the 



rostrum unconstricted at the base, and M. ccelomerus, Chevr., sulcate elytra and 









pilose tibiae 







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YUCCABORUS 



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Yuccaborus, Leconte, Proc. Am. Phil. Soc. xv. p. 331 (1876) ; Casey, Ann. N. York Acad. Sci. 

 II vLp. 687 (1892). 



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This genus, the type of which is Bhina frontalis, Lee, is very nearly related to the 

 .-American Sarpacterus, Schonh., but differs from it in having the eyes widely 





d the scutellum unim 





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parated above, the prothorax truncate at the base, ai 

 In Y. lenti ginosus , Casey, the elytra are asymmetrically maculate, much as in 

 H. quadrisignatus, Boh.*, except that the whitish spots in the latter are condensed 

 into larger patches below the base and towards the apex. 



The four described species are from the Southern United States or Mexico ; the type 



is found under the bark of Yucca in the Mojave Desert. 



The larva has been figured by Wickham [Journ. New York Ent. Soc. iv. p. 123, t. 5. 











123 (1896)1 



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1. Yuccaborus lentiginosis. (Tab. VIII. figg. 19, 19 a, s .) 



Yuccaborus leniiginosus, Casey, Canad. Ent. xxxvi. p. 323 (1904) \ 



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Hob. Noeth America 



Mexico, Orizaba (Salle) 



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There is a single ( <? ) example of a Yuccaborus from Orizaba in the Salle collection 

 that I am unable to separate from the series of Y. lentiginosus ( <5 $ ) sent us by 

 Mr. Wickham. The rostrum is shorter and still more strongly asperate, the prothorax 

 has a broader polished space on the middle of the disc, the irregularly-distributed 



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rounded spots surrounding the interstitial punctures on the elytra are a 



more scattered, and the first ventral segment is more feebly excavate, than 



in the male of the Texan insect; but these differences are individual rather than 





pecific 





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To judge from the supposed type of H. ebeninus, Boh., in the Somraer collection, it is probable that it will 

 prove to be a discoloured greasy example of H. quadrisignatus. An allied undescribed form occurs in Ecuador. 



biol. cente.-amer., Coleopt., Vol. IV. Pt. 7, October 1910. 2 AA 



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