500 ENTOMOLOGICAL NOTES. 



take its station. In this place, I find in the " Catalogue des 

 Coleopteres," an insect which is described in the Supplement to 

 the Count Dejean's " Species des Coleopteres," p. 455, that 

 very nearly agrees with the insect before me ; and what is 

 rather remarkable, it bears the very name {Eucheila) which I 

 intended to employ. There was, however, so evident a differ- 

 ence in magnitude, colour, and habitat, that I carefully went 

 over the characters again, and found this important difference — 

 Eucheila has the apical joint of the maxillary feelers cylindrical ; 

 /Enigma has the fame joint flattened, clavate, and truncate. 

 JEnigma may therefore with propriety be placed between 

 Catascopus and Eucheila. 



/Enigma iris was received from New Holland by Mr. 

 Bowerbank, and has been presented by that gentleman to the 

 Entomological Club. Its length is rather less than an inch, 

 and its breadth rather more than a quarter of an inch. Its 

 colour is the most lovely violet, which however varies on the 

 slightest alteration of position. Over the whole surface of its 

 head, prothorax, elytra, and legs, are scattered short hairs of 

 a pale yellow colour. 



Class, — Neuroptera. 



Natural Order. — Perlites, Newman. 



Genus. — Chloroperla, Newman. 



Sexuum amborum alis pariter repandis, pariterque abdomen tegen- 

 tibus : telo setis duabus instructo ; proalse nervo subcostali cum 

 costali parallel o. 



In July, 1833, I described a new insect, under the name 

 Isogenus Nubecula, distinguishing it as a genus from Perla, 

 by the circumstance of the wings being of full length in both 

 sexes ; whereas, in the true Perla, they are abbreviated in the 

 male. The present genus, Chloroperla, or green Perla, is so 

 named from the species having invariably a sea-green tint. It 

 is readily distinguished from Perla by its having the wings in 

 both sexes fully developed, as in Isogenus. It is separated 

 from Isogenus by the nervures of its fore wings ; the costal and 

 subcostal nervures in Chloroperla running parallel throughout 

 their length, whereas in Isogenus, and also in Perla, the 

 subcostal approaches and all but joins the costal nervure rather 



