1905.] 177 



melanoceplinla, Lat.), and rnfipes, F., have disappeared from our list. 

 1 am informed, however, by Mr. C. O. Waterhouse, who very kindly 

 carefully examined the species of Triplax in the Stephens collection 

 at the British Museum, that there are two undoubted specimens of 

 rufipes F., one with the label Windsor ; it is quite a distinct insect, 

 as Mr. Waterhouse says, more approaching Gijrlotri'plax in form ; of 

 ruJicoUis there is one undoubted specimen, without locality, but said 

 to have been taken near Windsor. 



In view of the fact that the species of this genus are excessively 

 local, though when found they often occur in great numbers, and that 

 Mr. Bagnall has just discovered a species, new to our list, in great 

 abundance in a locality worked for many years by that well-known 

 collector, Mr. Bold, I have every hope that we may yet see the other 

 two doubtful species of Stephens restored to our list. It seems 

 desirable, therefore, to give a simple table for separating the European 

 species likely to occur in Great Britain. 



In his " Monograph on the Erotylidse " (1842), Lacordaire 

 described eleven European species, and Bedel in his " Monograph " 

 [I'Abeille, vol. v (1868-69), p. 1], also described eleven species, but 

 he sank two of Lacordaire's species into varieties, namely, scutellaris, 

 Charp., as a var. of bicolor, Gyll, and clavata, Lac, as a var. of 

 rufipes, Fabr. ; in addition he added two new species to Lacordaire's 

 list, and made a few changes in synonymy. 



In the European Catalogue, H.R.W., 189], the genus contains 

 fourteen species ; one of Bedel's species, cyanescens, Bedel, is sunk as 

 a synonym of marseuli, Bedel, and there are in addition four new 

 species not mentioned by Bedel. I propose to confine my table to 

 those species of the European list which might be expected, from 

 their distribution on the Continent, to occur in Great Britain. 



I. Subgenus Tkiplax. 



Base of thorax strongly bordered, or furnished with a strongly naarked furrow 

 before the scutellum, body more or less parallel-sided. 



A. Head black. 



(I) melanocephala, Lat., ■= ruficollis, Steph. 



Easily distinguished by the fact that the antennoe are pitchy-red, 

 with the intermediate joints very close, moniliform, sub-equal, 

 and that the scutellum is black. 



(Occurs in Western Germany, France, Italy, and Spain, 

 and was said by Stephens to have been taken near 

 Windsor). 



