9 



same beliiiid 6.5 mm. ; height of ceplialothornx 3.5 mm. ; length 

 of abdomen 12. S mm. ; breadth and height of same 8.2 mm. ; 

 length of mandibles 4.75 mm. ; of claw 2.2 mm. ; of palpi 

 10.5 mm. ; of first pair of legs 25 mm. ; of second i)air 23.5 

 mm. ; of third pair 21.5 mm. ; of fourth pair 28 mm. 



The young on the parent's back differ from the adult in 

 having a broader dorsal stripe upon the abdomen, giving them 

 the appearance of being dark above, with silvery sides ; they 

 are about as long as the last joint of the tin'rd pair of legs. 



The egg cocoon is an irregularly spherical mass, 8 mm. in 

 average diameter, of a pale bluish gray color, smooth in some 

 parts, rough in others ; it is attached by a thick silken cord to 

 the abfhjmen of the mother, being grasped by the hinder pair of 

 mammillffi. Samuel H. Scudder. 



BIBLIOGRAPHICAL RECORD. 



The date of pulilicatioii, here given in brackets [ ], marks tlie time at wliicli the 

 work was received by tlie Editor, unless an earlier date of publication is known to him. 

 An asterisk * before a title is the Recorder's certificate of accuracy of quotation. Cor- 

 rections of errors and notices of omissions are solicited. — B. Pickman Mann. 



(Continued from Vol. I, page 216.) 



The Proceedings of the American Academy of Arts 

 and Sciences, vols, ix and xi (ser. 2, vols, i and iii) contain 

 nothing entomological; vol. x (ser. 2, vol. ii) contains No. 716. 



* 716. S. H. ScuDDEK. Historical Sketch of the Generic 

 Names proposed for Butterflies : a Contribution to Systematic 

 Nomenclature, p. 91-293. [April, 1875.] 



Decision, fouuded upon historical evidence and given canons of system- 

 atic nomenclature, concerning tlie validity of each name proposed for a 

 genus of butterflies and the species to be considered as typical of each 

 genus; discussion of some principles of nomenclature: attempt to fix the 

 dates of Hiibner's different works and of Doubleday and West wood's 

 Genera of Diurnal Lepidoptera. Discusses about 1104 names; Acentro- 

 cneme (Feld.) and Lethites appear for tlie first time as generic names. 



The Proc. Bost. Soc. Nat. Hist. [See Rec, Nos. 173-182], 



vol. xvii, from p. 257, contain Nos. 717 to 728. 



* 717. S. H. ScuDDER. Notes on Orthoptera from North- 

 ern Peru, collected by Prof. James Orton. p. 257-282. 

 [March, 1875.] 



Enumerates 46 species, including two not from Peru. Describes GryUo- 



