30 THE CANADIAN ENTOMOLOGIST. 



lect seeing larvée of Lampyris of the length of an inch and a-half. I enclose 

 the esuvia of a larva of one of the genera of this family, which I found under 

 bark here. lias it ihc form of your insect? I do not believe that the larvae 

 of Lampyris enclose themselves in cocoon-like balls such as are formed by 

 the larvse of Gcotrupes and Osmodcnna. As you can see from the exuvia, 

 its transformation is evidently similar to that of Dermestts ïarâarlas, and 

 other active Coleopterous larvye " [Our larva was immensely larger and 

 quite different from the owner of the esuvia sent us by our correspondent; 

 his looks very like the larvae of Chaidiopnathus petisyJvatiicas, a very com- 

 mon insect here, figured in the last number of the American SJntomologist, 

 but we could hardly judge from a cast-off skiti. We have, however, sent it, 

 together with a luminous female captured by Mr. Jas. Angus at West Farms, 

 N. Y., and another taken by ourselves here, to Philadelphia, for identifica- 

 tion.— Ed. C. E.] 



EXCHANGES. 



EuKOPEAN Djptera, &c — I have a large number of English, European, 

 and Exotic Diptera, entrusted to me for sale or exchange; in the latter case, 

 riynieuoptera, particularly the parasitic species, and minute Coleoptera, are 

 chiefly requested in return. — F. Walker, Elm Hall, Wanstead, Essex, Eng. 



CoLEorTERA. — I have been collecting Coleoptera for many years past, but 

 am still in want of many nortliern species; shall be glad to exchange. — J. 

 Akiiubst, 4J Prospect Street, Brooklyn, N. Y. 



Lepidoptera. — I wish to obtain any species of Labrador or other far 

 north butterflies, for which I would make a good return. I have a largo 

 number of specimens of various Catocalas, which I would gladly exchange 

 for the following species : C. relicla, um'juga, vxor^ cpione, po^T/f^orma? 

 bn'sefs, vidua. — James Angus, West Farms, N. Y. 



*^* We insert lists of specimens for exchange /rcc of charge to subscribers. 

 Of course it is understood that an actual quid pro quo is not expected, but 

 that all Entomologists are willing to help one another to the best of their 

 ability, without making a mercenary transaction of the exchange. 



NEW ENTOMOLOGICAL WORKS. 

 List of the Lepidoptera or North America. I3y Aug. 11. Grote & 

 C. T. Robinson. Part I. Philadelphia: American Enlomologicûl So- 

 ciety. September, 18G8. 



In 1860 the Smithsonian Institution published a catalogue of the described 

 Lepidoptera of North America, prepared by the Rev. Dr. Morris, which has 

 proved of very great value to the students of this order of insects. Since 



