Mr. Walker on the British Chalcidites. 307 



narrow ; ambulacra straight and simple, or each formed of two se- 

 ries of double pores. The fossil species are from the jura, chalk, 

 and tertiary deposits. There are also some recent. 



A. hieroglijphica, Ag. (Echi. hierogl., Gold/.) — A. sulcata, Ag. (E. sulc, 

 Goldf.) — A. nodulosa, Ag. (E. nod., Munst.) — A. granulosa, Ag. (E. gran., 

 Munst.) — A. alutacea, Ag. (E. alut., Goldf.) — A. radial a, Ag. (E. rad., 

 Hcen.) — A.pusilla, Ag. (E. push*., Munst.) — A. punctulata, Gr. — A. pus- 

 tulosa, Gr. 



7. Echinus, Linn, and Auct. — Ambulacra composed of segments 

 of arcs formed by several pairs of pores, and converging uniformly 

 towards the summit; disc circular or subangular, very regular. There 

 are fossil species from the jura, chalk, and tertiary deposits, as also 

 a great number of living ones. 



E. germinans, Phil. — E. perlatus, Desm. — E. lineatus, Goldf. — E. Me- 

 nardi, Desm. — E. Milleri, Desm. — E.regalis, Hcen. — E.ventricosus, Lam. 

 — E. scardicus, Lam. — E.pentagonus, Lam. — E. Peleolus, Lam. — E. varie- 

 gatus, Lam. — E. esculentus, Linn. — E. vulgaris, De Bl. — E. lividus, Lam. — 

 E. variolaris, Lam. — E. melo, Lam. — E. miliaris, Lam., &c. 



[To be continued.] 



XXXV. — Descriptions of British Chalcidites. By Francis Walker, 



r .L.o. 



INSECTA TETRAPTERA NECROMORPHA. 



Class Hymenoptera. 

 Stirps Ichneumonina. 

 Order Chalcidites. 

 Genus Cirrospilus, Westwood. 

 Fern. Corpus lineare, angustum, sat longum, parum convexum, nitens, 

 scitissime squameum, parce hirtum : caput transversum, breve, parvum, tho- 

 race angustius ; vertex angustus ; frons impressa abrupte declivis : oculi 

 mediocres, subrotundi, extantes : ocelli vertice triangulum fingentes : an- 

 tennae clavatse, corporis dimidio certe breviores ; articulus 1 us validus, 3 U9 

 brevissimus, 4 US mediocris, 5 US brevior et latior ; clava longiovata, apice 

 acuminata ; 5° latior et plus duplo longior : thorax longiovatus : prothorax 

 bene determinants, subtrigonus, transversus, postice latus incurvus: meso- 

 thoracis scutum subquadratum, longitudine paullo latius, postice angustius, 

 latera basi incurva; parapsidum suturae vix conspicuae ; scutellum obconi- 

 cum ; postscutellum transversum, breve, lunatum, apud latera laeve : meta- 

 thorax transversus, sat bene determinatus : petiolus crassus, brevissimus : 

 abdomen ovatum, depressum, subtus convexum, fere glabrum, thorace paullo 

 brevius non latius; segmenta transversa, l um magnum laeve micans, 2 um et 

 sequentia ad 6 um breviora, subaequalia ; pedes sat longi, graciles, subaequales ; 

 coxae parvae; femora subclavata ; tibiae rectae; tarsis articulus l us brevis, 



x 2 



