392 Prof. F. M'Coy on the Classification of 



g^ (R. acrisj flore pleno albo), and of the lesser spearwort (R. 

 .. Flammula). Found by Mr. E. Doableday in the leaves of the 



hart's-tongue {Scolopendrium vulgare). Ent. Mag. iii. 414, 



415. 



2. Ph. albiceps, Meig. vi. 194. Larva subcutaneous in the leaves 

 of the cow-parsnep [Heracleum Sphondylium), and the field- 

 thistle (Cnicus arvensis). Pupa-case black. 



3. Ph. Aquilegi(2, Hardy MSS. Nigricans; hypostomate sor- 

 dide subflavo, proboscide alba; fronte flava; antennis pal- 

 pisque nigris ; thorace brevi, subrotundato, convexo, nigro- 

 grisescente, subnitido, lineis dorsalibus longitudinalibus dua- 

 bus obscuris ?egre distinguendis, adumbrato; scutello conco- 

 lore; abdomine griseo-nigricante, nitido, incisuris interdum 

 stricte albescentibus ; vitta laterali parva alba ; ventre nigro ; 

 pedibusnigris_, genubus perobscurius pallidis ; halteribus albis ; 

 alis hyalinisj ad bases exalbidis_, nervo transverso singulo. 

 Long. Corp. prope lin. 1. 



The larva forms blotches in the leaves of the common colum- 

 bine {Aquilegia vulgaris). It is closely allied to Ph, albiceps, but 

 is darker, with the thorax shorter and rounder, and the white 

 dashes before the wings not developed. The pupa-case is brown. 



To these may be added others whose changes are still incom- 

 plete, found within the leaves of the bean ( Vicia Faba), the bur- 

 dock {Arctium Lappa), the field-thistle (Cnicus arvensis), the wild 

 angelica {Angelica sylvestris), the red clover {Trifolium pratense) , 

 the red hemp nettle {Galeopsis Tetrahit), the climbing buckwheat 

 (Polygonum Convolvulus), the quicken (Triticum repent), the mea- 

 dow- sweet (Spir^aa Ulmaria), and the kidney-vetch (Anthyllis vul- 

 7ieraria) . 



Penmaiishiel, by Cockburnspatli, Oct. 13, 1849. 



XLI. — On the Classification of some British Fossil Crustacea, 

 with Notices of new Forms in the University Collection at Cam- 

 bridge. By Frederick M'Coy, Professor of Geology and 

 Mineralogy in Queen^s College, Belfast. 



[Continued from p. 335.] 



Ord. Edriophthalma. 



(Trib. Isopoda.) 



Archaoniscus Brodiei (M. Edw.). 



As this interesting Wealden Crustacean (first I believe taken for 

 an oolitic Trilobite) has not yet been fully described, the follow- 

 ing notice may be acceptable : — 



