54 THE CANADIAN ENTOMOLOGIST. 



process of specialization in adaptation to new conditions of life. A nomen- 

 clature is adopted for these veins, following Redtenbacher, which is to be 

 applicable to all insects, taking account of the veins developed in certain 

 families between radius ^^sub-costal) and media (discal), and between 

 media and cubitus (median). These the author believes to be of second- 

 ary origin. The paper is illustrated by ;^;^ figures of venation and three 

 plates. 



It is a valuable contribution to American entomology, and should be 

 carefully read by all who wish to see a scientific classification take the 

 place of the misty divisions heretofore in use in Lepidopterology. 



Harrison G. Dyar. 



CORRESPONDENCE. 



PAPILIO CRESPHONTES. 



On the 17th of October I found near London a colony of larvae 

 of this butterfly, from one nearly full fed to half-a-dozen little ones about 

 half an inch long. J. Alston Moffat, London, Ont. 



ON TRI^NA. 



The generic term Triceiia is used by Hiibner (see my list. Can. Ent., 

 xvii., 95, of the North Am. Dagger Moths) for a genus of Noctuidce. 

 Consequently, the Thysanurid genus (Can. Ent., xxv., 318) must be re- 

 named, and may be called MacgilUvraya, with T, mirabilis, Tullb., as 

 type. A. R. Grote, A.M. 



EUDRYAS CYPRIS. 



I would add to my description of this South American speCies in the 

 Dec. No. of the Canadian Entomologist, that the point in which it 

 agrees with grata is the deep, outward, even sweep of the pale median 

 field of primaries. In unio, the uneven outer margin of the median field 

 is nearly perpendicular from within apices on costa to above internal 

 angle. Cypris differs from grata by the darker marginal band being 

 continued inwardly from apices along costa, as also by the absence of the 

 prominent dark costal stripe from base outwardly. The darker, creamy 

 and olivaceous or ochraceous median field of primaries, as well as the red 

 unhanded hindwings and undersurface, are quick characters by which 

 Cypris may be distinguished from either of its allies. A. R. Grote. 



Mailed February 3rd. 



