388 BRITISH OBIBATID^. 



developed, formiug large receptacles for the support 

 of the first pair of legs. Apodemata joined to the 

 sternum. 



Legs rather long, hind pair reaching considerably 

 beyond the posterior margin of the abdomen. Femora 

 slim and without blades. Claws monodactyle. There 

 are a few fine curved hairs arranged in a whorl on 

 each joint of the legs except the tarsi, which are pro- 

 vided with numerous fine hairs as usual. 



Abdomen elliptical, the breadth of the ellipse varies 

 considerably in different specimens. There are two 

 longitudinal rows of fine hairs near the middle of the 

 notogaster and a border of similar hairs near the edge. 

 Genital and anal plates far apart, nearly square, the 

 anal plates much larger than the genital. 



Nymph. 



The form and general effect of the creature are very 

 similar to those of the adult. 



Colour light pearly-grey, almost white, sometimes 

 semi-transparent. 



Texture smooth, scarcely polished. 



Cephalothorax much as in the adult, but wider pos- 

 teriorly. Pseudo-stigmatic organs rough, but without 

 the well-marked pectinations of those of the adult. 

 Lamellar and interlamellar hairs strongly bipectinated. 



Legs without the thin peduncles to the joints which 

 are found in the adult. 



Abdomen very like that of the adult, but truncated 

 anteriorly instead of being rounded. Hairs on the 

 notogaster arranged in rows, &c., similar to those of 

 the adult, but rather more numerous, and all strongly 

 bipectinated. 



Distribution. — I found this species in considerable 

 numbers in an old thatched roof in Warwickshire, it 

 may probably be found in other classes of situations, 



