542 



ME. G. BROOK ON A NEW GENUS OF COLLEMBOLA. 



in December last, and, after a cursory examination with a pocket- 

 lens, were labelled Begeeria lanuginosa (Nicolet), on account of 

 tbe absence of markings and the very thick clothing of hairs, 

 especially on the thorax. As I was engaged on a revision of 

 JSTicolet's genus, they were kept alive for further observation. It 

 was soon found, however, that my specimens differed in several 

 important points from Nicolet's species. Instead of having eight 

 lenses in each eye-patch, I could only find two lenses on each 

 side, and each on a separate patch. The structure of the claws 

 and spring also presented characters which did not agree with 

 the diagnosis of Begeeria. In the course of a few days faint ful- 

 vous patches began to appear on my specimens ; and in a week 

 more some of them were quite dark fulvous, with a few lighter 

 dorsal patches. This colour is not distributed in more or less 

 sharply defined spots and patches, as is usual in those species of 

 Begeeria which have markings, but the general body-colour be- 

 comes a rich fulvous, darker laterally, and shading off" to the 

 median dorsal line. The specimens were also armed with a kind 

 of curved clubbed setse on the abdomen, quite different from the 

 setae of any species of Begeeria with which I am acquainted. 

 For these reasons, and after a careful comparison with allied 

 British species, I feel justified in proposing a new genus for the 

 reception of these specimens. 



Fiff. 1. 



Sinella curviseta, n. sp. A. Full-grown insect, showing distribution of colour- 

 patches, X 16. B. Pale specimen, showing position of ej-e-patches, X 16. 0. 

 Dark specimen, showing patches of colour and shape of third abdominal 

 segment, X 16. Drawn from enlarged photographs and specimens mounted 

 on microscopic slide. 



