430 Canon A. M. Norman on Bril/sh Isopoda. 



small, scarcely extending beyond tlie basal segment of the 

 abdomen ; tegmina and wings hyaline, a little opaque at 

 base. 



Type, 0. boliviana, Dist. (Cicada). 



Cryptotympana varicohr, sp. n. 



?. Body brownish ochraceous; pronotum with two in- 

 wardly curved obconical black spots and two more obsolete 

 black oblique spots on each lateral area between the incisures, 

 but not extending to the posterior margin ; mesonotum with 

 a large pale greenish discal spot, its base truncate and resting 

 on the cruciform elevation, anteriorly divided into three 

 angular prolongations which about reach the anterior margin ; 

 lateral areas of the sternum somewhat pale greenish. Teg- 

 mina and wings hyaline, bases of both brownish ociiraceous ; 

 the tegmina with the costal membrane and area, the basal 

 cell, the greater part of the venation, and the margins of the 

 transverse veins at bases of second and third apical areas 

 brownish ochraceous. 



Length of head about half tlie width between eyes, and 

 including eyes considerably broader than base of mesonotum ; 

 rostrum passing the intermediate coxse ; body beneath finely 

 pilose; anterior femora armed with two long spines beneath. 



Long., excl. tegm., ? 31 mm. ; exp. tegm. 102 ram. 



Hub. Sumbawa Island (Paris Mus.). 



LX. — British Isopoda of the Families ^gidaj, Cirolanidee, 

 TdoteidaB, and Arcturid*. Bv Canon A. M. NORMAN, 

 M.A., D.C.L., LL.D., F.R.S., &c. 



[Plates Xn. k XIIL] 



The purpose of this paper is to bring up our knowledge of 

 the Crustacea of the above-named families to the present 

 time. Most of the additions to our fauna are here first made 

 known. In Bate and Westwood's * Sessile-eyed Crustacea ' 

 the numbers of species described were : — ^Egidae 5, Ciro- 

 lanidse 4, Idoteidee 7, Arcturidse 3 (of these, Arcturus 

 gracilis was the male of A, longicornis). The following notes 

 record — -3i^gidge 10 (one of these, JE. rosacea, a doubtful 

 Britisii species), Cirolaiiidse 9, Idoteidse 11, Arcturidae 6. 



Besides the British Isopods there have been added such 

 species as have been taken by dredging-expeditions of the 



