158 HEMIPTERA. 



difficult to observe, owing to their being so slender and 

 narrow, and on being shook out of the grass or moss they 

 lie perfectly still and then resemble a piece of dried grass. 

 Fieber, in writing to Douglas and myself, says that he 

 possesses thirteen species of this genus. 



Division Lyg^ina. 



Chilasis TijjjIkb, Muls. The only specimens I have seen 

 of this insect were in the late Mr. Curtis's collection, who 

 had them, as he informed me, from the Rev. Mr. Rudd. A 

 ticket was attached to them, stating that it had been taken by 

 Mr. Rudd in the heads of Tijpha laiifolia in profusion, at 

 Stockton, in November. 



Megalonotus pilicorms, Muls. Two examples taken by 

 Mr. E. C. Rye. No date or locality is given. 



Drymus pilipes, Fieb. This insect was taken by Mr. E. 

 C. Rye amongst moss ; but I have no date or locality 

 attached to it. 



Plinthisus bidentulus, H. Sch. Seemingly a rare species, 

 and taken in company with P. hrevipennls at Dartford 

 Heath, in August and September. 



Division Hydrometrina. 

 Sydrometra aptera, Wimm. A large species. Yery 

 abundant in the Ravensbourne during the summer months, 

 and but seldom found with fully developed elytra or wings. 

 According to Dr. Fieber it is the Gerris canalium of L. 

 Dufour, and the Cimex Najusoi'De Geer. 



Division Corixina. 

 Corixa atomaria, Illiger. A single example taken by 

 Mr. Crotch, but there is no locality or date given. 



