■ 













- 





ADEPHAaA. 



289 











■ 



;i 















■ 





. 



■ ■ ■ ■ 



Distinguished from T. amplicollis by its smaller size and the distinctly impressed, 

 though abbreviated, second and third strife.. From T. jansoni it differs in the much 



broader thorax and the simple or very faintly punctured second and third striae. . 







. 











■ 



: 



■ 









. 





■ ■ 

 ■ 





. 





- 



* 



Tachys jansoni (p. 143). 



To the localities given add: — Panama, Bugaba (Champion). 





















■ 







• 





. 





■ 





■ 

 ■ 



• 





. ■ 







■ 







■ 





. 



. 







■ 



24(a). Tachys duplex. 



T. cribellato proxime affinis. Castaneo-fuscus (capite thoraceque interdum rufioribus) supra subseneo tinctus, 

 macula indistincta humerali elytrorumque margine plus minusve rufo-castaneis ; palpis, antennis pedibusque 

 fulvo-testaceis ; thorace sat late transverso, antice valde rotundato, postice sinuato-angustato, angulis 

 posticis rectis, sulco basali recto, punctulato-crenulato, prope angulum carinula obtusa obliqua ; elytris 

 utrinque striis punctatis quinque, 5 a laterali valde abbreviata, suturali versus apicem tantum acute im- 

 pressa ibique impunctata. 



Long. 1 lin. 



■ 



: 











■ 



. 







■ 



■ 

 ■ 





■ 









Hob. Guatemala, San Geronimo (Champion). 





. 



Rather larger and broader than T. immaculatus ; the fifth stria much shorter, termi- 

 nating at about one third the length of the elytra, whilst in T. immaculatus it extends 



beyond the middle, and is not perceptibly shorter than the fourth. 



■ 



■ 















24 (b). Tachys immaculatus. 









Pericompsus immaculatus, Bates, Entom. Monthl. Mag. vn. p. 246 \ 

 Var. Capite elytrisque cum plaga communi discoidale senescenti-fuscis. 



Hab. Panama, near the city (Champion). — South Ameeica, Amazons K 



This species will be better placed in Tachys than in Pericompsus, owing to the total 

 absence of the sixth elytral stria, which is the only structural character of the latter 

 genus. With T. duplex, T. cribellatus, and the following (T. gracilior) it forms a 



section of Tachys which approaches Pericompsus not only in the number of the striae, 

 but in these being all, including the sutural (except near the apex), equally incised. 

 In Tachys (typical) the sutural stria is distinguished from the rest (except always, of 



■ 



■ 



■ 



■ 



■ 



. 



■ 







. 







■ 











■ 



course, the marginal) in being more acutely impressed. 























. 



■ 









. 









■ 

















. ■ 







■ 





■ 



■ 

 ■ 



■ 







■ 









24 (c). Tachys gracilior. 



Pericompso ephippiato (Say) quoad formam simillimus ; differt elytris 5 striatis, striis conspicue punctatis, 

 haud impressis : rufo-testaceus, elytris utrinque pone medium macula vaga angulari rufo-fusca apiceque 

 flavo-testaceis. 



Long, 1^ lin. 



Hab. Mexico, Yantepec (Flohr). 



Differs from the other 5 -striated Tachys by its more slender form, in which it 



biol. CENTE.-AMEE., Coleopt., Vol. I. Pt. 1, July 1884. 



2pp 





.' 







V 



, 







■ 













* 









- 



