ELY TROPACH Y S . 



267 



Genus ELYTROPACHYS, Motschulsky. 



Elytropachys, Motsch., Bull. Soc. Nat. Mosc. xxxix, 1866, part 1, 

 no. 2, p. 419. 



Pexodorus, Jac, Proc. Zool. Soc. London, 1887, p. 94. 



Genotype, Aphihona latissima, Motsch. (Ceylon). 



Body ovate, narrowed in front, broadened behind ; not strongly 

 convex above as compared with some related genera. Head 

 broad ; eyes strougly convex. Palpi slender, filiform. Antennae 

 filiform, second segment short, third and fourth equal in length. 

 Proihoraoc broader than long, with the surface convex and 

 impunctate. Scutellum triangular. Elytra slightly broader than 

 prothorax at base, with a post-basal shallow depression, the area 

 in front of which is convex ; the tine punctures are more or less 

 regularly arranged in rows. Underside: epipleura of the elytra 

 narrowed considerably, but not continued behind the middle ; 

 anterior and middle tibia? unarmed at the apex; each of the 

 posterior tibiae with a small minute spine at the apex ; first 

 segment of posterior tarsi as long as the two following together ; 

 claws appendiculate ; presternum distinct; anterior coxal cavities 

 closed. 



Range. Ceylon. 



Motschulsky, in proposing the genus Elytropachys in 1866 made 

 Aphihona latissima, Motsch., the genotype. In the British 

 Museum there is an example bearing a label in Baly's hand- 

 writing, on which Baly states that the specimen was obtained 

 from Motschulsky' s collection, througli Schaufuss, as an example 

 of Aphihona latissima. I therefore take this particular specimen 

 in the British Museum as authentically named by Motschulsky 

 himself; In 1887 Jacoby described a new monotypic genus for a 

 Ceylonese insect and called it Pexodorus, naming the species 

 P. ceylonensis. On comparing these examples of Pexodorus ceylon- 

 ensis and Aphihona latissima, I find that they are identical. 

 Jacoby's Pexodorus must therefore become a synonym of Mot- 

 schulskv's Elytropachys', while Pexodorus ceylonensis, Jac, falls as 

 a synonym of Elytropachys latissima, Motsch. In the Munich 

 Catalogue (Gemminger and Harold), xii, 1876, p. 3510, Elytro- 

 pachys, Motsch., is treated as a synonym of Aphihona, Chevr. 

 Motschulsky described the genus Elytropachys as " a Halticid with 

 the characters of Aphthona, with pronotum very broad, and with 

 elytra almost square, and transversely impressed on their anterior 

 part." 



No key to the species is given, as I have only seen one species, 

 E. latissima ; but translations of the brief original descriptions of 

 four others are added. 



