COLEOPTERA. — COCCINELLID-^. 397 



there seemed nothing but vegetable food at all sufficient for such 

 a multitude. On one occasion they appeared to consist exclusively 

 of C. 7-punctata: each remained in the pupa state twelve days ; 

 and another pupa of C. mutabilis, which was found on the nettle 

 at the same time, remained thirteen days. I am indebted to M. 

 V. Audouin for an opportunity of observing the habits of Coccinella 

 Argus {fig. 49. 21.) Scriba (Panz. 79. f. 4. ; C. 1 1-maculata Fabr.) in 

 its various states, and which he had detected upon the leaves of the 

 common Bryonia at Sevres, upon which the larva feeds. In the 

 middle of the month of July we found the insect in all its states ; 

 the larva {fig. 49. 22.) being distinguished by the spinose spines 

 with which the body is armed, each segment having six. On as- 

 suming the pupa state, the skin of the larva is not cast off, but a 

 slit is made down the back, exposing the back of the enclosed pupa. 

 The imago is about the size of C. 7-punctata, and is clothed with 

 a very fine pubescence.* The same indefatigable observer has in- 

 formed me that he has observed that C. 7-punctata is subject to 

 the parasitic attacks of Microctonus terminalis Wesm., and Encyrtus 

 flaminius Dahn. The larva of the former has been observed by him 

 to burst forth from the body of the imago of the Coccinella, spin- 

 ning its web beneath the body, and therein undergoing its trans- 

 formation. Much popular matter connected with these insects is 

 collected by Kirby and Spence (vol. i. letter 9., and vol. ii. p. 9. and 

 230.), and in the Gardener s Magazme, vol. iv. p. 159. 445. De 

 Geer has given a very complete account, with figures, of the struc- 

 ture and transformations of Coccinella ocellata {Mem. torn. v. pi. 11.), 

 and of C. 7-punctata {Ibid. pl.lO. f 14 — 20.); and Reaumur, in his 

 Histoire des Vers Mangeurs de Pucerons {3Ic?n. torn. iii. ch. 11.); 

 Albin {Natural Hist. Engl. Ins. pi. 61.) ; Frisch (vol. i. pt. 4. tab. 1.); 

 Gcedart (No. 112.) ; and Ilerbst [Naturgst. vol. v. tab. 5.) ; have 

 given various accounts and figures illustrating the transformations of 

 the different species of the genus Coccinella. Dr. Ilatzeburg has also 

 figured C. 7-punctata in its different states, with details in his work 

 upon forest insects (Berlin, 1837). 



j The larva {fig. 49. 24.) of the genus Chilocorus Leach [fig. 49. 23. 

 C. Cacti), is distinguished by having each of the segments of the body 



* BI. Li1on Dufour has pointed out several iinj)ortaiit anatomical variations between 

 C. Argus and C. 7-punctata; the former insect being destitute of the slightest trace 

 of salivary vessels, its alimentary canal being also four or live times the length of the 

 body; whereas it is only twice as long in the latter species. 



