298 Mr. D. Sharp's revision of the 



to the tarsi ; the squamosity of the surface is such 

 as is considered diagnostic of the Ctenistini by Herr 

 Eeitter. 



Kaphitreus, n. g. 



This genus is established for Tmesiphorus speratus, 

 Sharp. When describing that insect I alluded to certain 

 characters which distinguished it from its North American 

 congeners, but did not think it necessary to give it a 

 separate generic name ; the progress of analysis since 

 then renders this now inevitable. The important fact 

 that each of the three terminal joints of the maxillary 

 palpus is provided externally with a setiform appendage 

 differentiates the insect from Tmcsiphorus ; in this 

 respect it somewhat resembles Desimia, Reitter (Tetrads, 

 Sharp), but this is the only point of considerable approxi- 

 mation between the two, and the structure of the head, 

 thorax, and hind body are quite different. The other 

 two Japanese Tmesiphori will pretty certainly constitute 

 also a genus distinct from Tmesiphorus, as they have 

 the mesosternum entirely ecarinate ; but as this 

 character has not been examined hitherto in the allies, 

 they may at present remain in the genus. Raphitreus 

 has the three terminal joints of the maxillary palpi rather 

 stout and acuminate (but not prolonged) externally, and 

 each armed with a conspicuous articulated seta ; the 

 head, thorax, and elytra are formed as in Tmesiphorus, 

 and the basal dorsal plates of the hind body are cari- 

 nate ; the mesosternum also is strongly carinate along 

 the middle. Whether T. costatus, Weise, be a Raphi- 

 treus or not, I cannot say ; the species has not been 

 found by Mr. Lewis, and is unknown to me. 



Tmesiphorus speratus. 



Tmesiphorus speratus, Sharp, Trans. Ent. Soc. Lond., 

 1874, p. 109. 



Mr. Lewis has now found three other males of this 

 species on Maiyasan, Kobe, 14th July, 1881 ; Kashi- 

 wagi, 23rd June, 1881 ; and at Oyama, 25th May, 1880. 

 The female is still unknown. 



