THE PSOCID/E AND THE SNOW-FLEA. 203 



Literature of the Psocidae. 



The following is some of the more easily accessible literature of the 

 Psocidce that maybe consulted by those who would know more of this in- 

 teresting group, and acquaint themselves with some of our species : 



Westwood: lutrocluc. Class. Ins., ii, 1840, i)p. 17-20 (general notice of family). 



Gloveh: iu Rept. Comm. of Agiicul., 1858, p. 263 (brief notice). 



IIagex: Synop. Neurop. N. A., 1861, pp. 7-14 (describes 18 species); in Proc. 



Ent. Soc. Phil., ii, 1863, pp. 167-8 (observations on 6 species); in Ent. 



Month. Mag., ii, 1865, p. 122 (Clothilla aunulata); in Psyche, iii, 1881, pp. 



195-6, 207-210, 219-223 (Psociua of the U. S.); id., iv, 1883, p. 25 (tarsal 



and autennal characters); iu Stett. Ent. Zeit., 1883, pp. 285-332, pi. 2, 



in S. E. Z., 1882 (Monographic der Psociden). 

 Fitch; In Trans. N. Y. St. Agricul. Soc.,. xxii, 1862, pp. 668-675; 8th Rept Ins. N. 



Y., in 6th-9th Repts, 1865, pp. 186-193 (five new species of Sniynthurus 



described and noticed). 

 Walsh: in Proc. Ent. Soc. Phila., ii, 1863, pp. 182-186 (describes 7 n. .sp., and re- 

 marks on others). 

 Harris: Entomolog. Corr., 1869, pp. 327-332 (describes 7 species). 

 Packard: Guide Stud. Ins., 1869, p]). 588-590, fig. 573 (general remarks). 

 Scudd.-Btjrg. : in Psyche, ii, 1877, pp. 49-51, 87-89 (head-structure of Atropos). 

 Ashmead: in Canad. Entomol., xi, 1879, pp. 228-9 (P. citricola, n. sp); Orange 



Insects, 18S0, pp. 37-38 (orange Psocus), 71-3 (habits of P. venosus). 

 McLachlan: in Entomol. Month. Mag., xix, 1883, pp. 181-185 (descriptions and 



generic criticisms). 

 Aaron: in Trans. Arner. Ent. Soc, xi, 1884, \^\^. 37-40 (new species in Coll. of 



Soc). 



Achoriites nivicoLa (Fitch). 

 The Snow- Flea. 



(Ord. Neuroptera: Fam. Podurid/E.) 



Podui'a 7iivicola Fncn: in Amer. Quart. Journ. Agricul. -Sci.. May, 1847, v, p. 



284; Id., for September, 1847, vi, p. 152; Winter Insects of Eastern New 



York (sep. from prec), pp. 10-11. 

 Podiira nivicola. Ashtox: in Proc. Ent. Soc. Phil., i. 1861, p. 32. 

 Fodura nivicola. Wai,sh-Riley: in Amer. Entomol., i. 1869, j). 188 (in Wisconsin). 

 Achorutes nineola Packard: in Fifth Ann. Rept. Peabody Acad. Sci., July, 1873, 



pp. 29-30. 



Specimens of this winter insect were received from Mr. John M. 

 Dolph, for name, with the information that they were found abundantly 

 at Port Jervis, N. Y., on the 25th of January, both upon the surface of 

 the snow and in pools of water made by the melting snow. 



