Prof. C. Morren on the Morphology of the Ascidia. 411 



Var. a. tibiis tarsisque basi testaceis. 



Var. /3. thoraceque ferruginoso. 



Var. y. pedibus nigris. 



Fallen, Act. Holm. 1813, p. 255. Hydrom. 5. Meig. Dipt. Eur. 

 vi. 117. Macq. S. ^ B. ii. 537. — Ephydra salinarum. Bouche, Na- 

 turg. Ins. i. 99. tab. 6. fig. 13—14, larva and pupa. 



Sp. 34. micans, E. obscure viridis pedibus nigris, alis fuscanis, 

 arista nonnisi basi pubescente, facie alba aut flavicante. 



Ent. Mag. i. 175. 



This may be a mere variety of the last species ; as such 

 Fallen has considered it. 



Subg. 11. Canace, Cm^t. Guide, App. 



Caput depressum. Facies transversa, perpendicularis, subimpressa, 



lateribus ciliata; clypeus exertus; peristoma magnum. Oculi ellip- 



tici transversi. Arista pubescens. Abdomen conicum, 7-annulatum, 



segmento 2^ maximo. Areolse praebrachialis et analis parvse completse. 



Sp. 35. nasica (Curt. App.), E. Can. cinerea fronte thoraceque 



ferruginosis, facie albida, tarsis basi ferrugineis. 1^ lin. 

 England ; communicated by F. Walker. 



Authors cited or re/erred to, 

 DeGeer, M^moires. — Fabricius, Entomologia Systematica ; Sy- 

 stema Antliatonim. — Latreille, Histoire Naturelle Generale, &c. ; 

 Genera Crustaceorum et Insectorum ; Regne Animal, Ed. 2^^. — 

 Fallen, Diptera Suecise, Hydromyzides ; Methodus Dipterorum ; Act. 

 Holm. 1813, Hydromyzides Sueciae. — Meigen, Europaischen Zwei- 

 fliigeligen Insekten. — Macquart, Suites a BufFon, Insectes Dipteres. 

 — Robineau Desvoidy, Myodaires. — Entomological Magazine, vol. i. : 

 Catalogue of Diptera, &c. — Bouche, Naturgeschichte der Insekten. — 

 Curtis's Guide, 2nd Edition, Appendix. 



XLIV. — Further Remarks on the Morphology of the Ascidia 

 of Plants, By M. Ch. Morren, Professor of Botany at 

 Liege, Member of the Royal Academy of Brussels. 



From the notice on the morphology of the ascidia which I re- 

 cently presented to the Academy* it may be seen that I con- 

 sider the cucuUiform pitcher of plants as a variation in form 



* A translation of which appeared in No. XV HI. of this Journal. 



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