PYTHTD.^. 177 



" Var. imjnmctata. Thorax without spots, apex of elytra only just 

 black (Mr. Donisthorpe has captured specimens intermediate between 

 this and the type, the spots being only just visible). 



" Var. i-punctata. Elytra with two small black humeral spots, in 

 addition to the tw^o on the thorax, the margins of the anterior angles of 

 the elytra black ; apex also black. 



" In addition to these forms the size of the spots and of the apical 

 black marking of the elytra vary considerably." 



Mr. Bouskell does not appear to have compared his insects with a 

 Continental series, and it is possible that one or two at least should 

 be referred to r«r. innotata. Pic. (1898), var. ohscurijiennis, Pic. (1897) 

 or var. vittrpennis, Seidl., all of which are mentioned in the last Euro- 

 pean catalogue. 



It is worthy of note that Mr. Donisthorpe has taken a form of the 

 male in Hujitingdonshire, with the femora quite simple. 



PYTHIDiE. 



RABOCERUS, Sharp nee Mulsant. 



In Ent. Mo. jNIag. xlv. (2 Ser. xx.) 1909, p. 245, Dr. Sharp revives this 

 genus of Mulsant, but adds to it the genus Colposis of the same author ; 

 both of these are easily distinguished from Salpingus as ordinarily 

 constituted by reason of their long and much exserted mandibles ; in 

 the last European catalogue the name S'phmriestes, Steph., is substituted 

 for Salpingus, Gyll., the latter being considered as a synonym of 

 Iih'inosi77ius. 



Rahoceriis then, as now constituted, consists of two forms : 



I. Mandibles very elongate, regularly serrate along 



their inner margin, the teeth being 12-13 in 



number ........ Rabocerus, i. sp. 



II. Mandibles shorter, obscurely denticulate on their 



inner margin Colposis, Mais. 



The species described below belongs to the subgenus Colposis. 



R. bishopi, Sharp (Ent. Mo. Mag. xlv. (2 Ser. xx.) 1909, 245). 

 ^Eneous black, shining, with the base of the antennje red and the tibise 

 and tarsi fuscous, the former yellowish towards base ; thorax with four 

 impressions, strongly punctured ; elytra deeply impressed behind the 

 scutellum, punctured in rows. The species is closely allied to R. 

 niutilatus, Beck., but the colour is difierent, the tarsi are more elongate 

 and slender and the antennae somewhat slighter. Head and rostrum 

 rather closely punctured, the sculpture on the front of the latter not 

 rugose ; antennas with the first four joints red, the rest black, club 

 5-jointed, the sixth joint a little broader than the fifth, the penultimate 

 joints each about as long as broad, palpi infuscate. Thorax closely and 

 rather coarsely punctured, shaped as in R. [Salpingus) mutilatus, with 

 the four depressions usually deep. Elytra with the basal depressions 



