176 DOLEEUS FISSUS. 



20. DOLEEUS FISSUS. 

 PL VI, fig. 3, lar. ; PL XVIII, figs. 7 and 8, Saw. 



Dolerus fissus, Htg., Blattw., 243, 37 $ ; Zad., Beschr., 24 ; 

 Andre, Species, i, 279, 13; Cat. 35,* 

 48. 



Dolerus leucobasis, Htg., Blattw., 240, 31, ^ (ab.). 

 ? _ planatus, Htg., Blattw., 243, 39, <. 

 cenchris, Htg., Blattw., 240, 32 $ ; Evers., Bull. Mosc., 

 xx, 25, 16; Thorns., Hyra. Scand., i, 

 290, 24 ; Cam., Fauna, 49. 



Black ; covered with a short grey pile ; head thick, strongly punc- 

 tured ; sutures on the vertex almost invisible. Antennae scarcely as 

 long as the abdomen ; middle joints somewhat thickened; third joint a 

 little longer than the fourth. Mesonotum strongly punctured through- 

 out, almost opaque ; sutures moderately deep ; cenchri large, ivory 

 white. Abdomen smooth, shining, almost glabrous at the base, pilose 

 from the fourth segment; blotch long and narrow, segments edged 

 with white, sometimes quite black. Wings hyaline ; costa and stigma 

 black, the latter sometimes pale on the lower side. 



The <J has the antennae longer than the abdomen, the abdomen 

 rather wide ; the two apical segments with a white membranous spot 

 in the middle ; the three basal segments smooth, almost glabrous, the 

 rest densely pilose. 



Length 4^ 4| lines. 



Easily known by the mesonotum being uniformly 

 and strongly punctured all over, and by the large 

 ivory-white cenchri. 



The larva of fissus has been described by Zaddach 

 (1. c., p. 15). He says that he found it in June feeding 

 on grass. It was of a greyish-white colour, with the 

 back of a darker grey and the head yellowish. Unfor- 

 tunately it buried itself in the earth before a minute 

 description of it could be taken. I also bred it from 

 a larva (the same, I believe, as that figured in PL VI, 

 fig. 3) which fed on Festuca. 



Fissus is a common British species. I have found 

 it in the Glasgow districts, Perthshire, Inverness- shire 

 and Sutherlandshire ; while Mr. Hardy has captured 

 it in Berwickshire. I have seen English specimens 

 from Manchester, Worcester, Glanvilles' Wootton, 

 York, Norwich, and the London district. 



On the Continent it has been recorded from Sweden, 

 Germany, France and Russia 



