THE PSOCID^ AND THE SNOW-FLEA. 



203 



Literature of the Psocidae. 



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

 FsocidLe that may be consulted by those who would know more of this in- 

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



Westwood: Introduc. Class. Ins., ii, 1840, pp. 17-20 (general notice of family). 



Glover: in Kept. Comm. of Agricul., 1858, p. 363 (brief notice). 



Hagex: 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. 123 (Clothilla annulata); in Psyche, iii, 1881, pp. 



195-6, 307-210, 219-223 (Psocina of the U. S.); id., iv,*1883, p. 25 (tarsal 



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



in S. E. Z., 1883 (Monographie 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 Smynthurus 



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, pp. 588-590, fig. 573 (general remarks). 

 ScuDD.-BuRG. : 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, 1880, 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. Amer. Ent. Soc, xi, 1884, pp. 37-40 (new species in Coll. of 



Soc). 



Achorutes nivicola (Fitch). 

 The Snoiv-Flea. 



(Ord. Neuroptera: Fam. Podurid^.) 



Podura nimcol(iYYY:QVi.: \x^ 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. 

 Podura niucola. Ashton: in Proc. Ent. Soc. Phil., i, 1861, p. 33. 

 Podura nivicola. Walsh-Riley: in Amer. Entomol., i, 1869, p. 188 (in Wisconsin). 

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



pp. 39-30. 



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. 



