462 EXPEEIMENT STATION RECOED. [Vol. 38 



Biology of the Membracidae of the Cayuga Lake Basin, W. D. Funkhouseb 

 (New York Cornell Sta. Mem. 11 {1911), pp. 181-U5, figs. SSI).— This luemoir 

 reports investigations made of 61 species of membracids representing 21 

 genera belonging to three subfamilies, found particularly in the vicinity of 

 Ithaca, N. Y. Keys are given to the genera and species with technical descrip- 

 tions and brief accounts of their life histories, an account of the external and 

 internal anatomy of the Membracidae, etc. Among the subjects discussed are 

 the geography and physiography of the Cayuga Lake Basin, climatology of the 

 basin, the basin as a floral and faunal area, distribution and range of the 

 family, a comparison of Cayuga Lake Basin with the State as a whole, theories 

 of origin and paths of migi-ation, hosts, migrations, habits, attendance by ants, 

 communal life, ecology, natural enemies, economic importance, methods of 

 collecting and preserving, etc. A check-list of the genera and species and a 12- 

 page bibliography are included. 



The Indian sugar cane leaf hopper (Pyrilla aberrans), C. S. Misra {Mem. 

 Dept. Agi: India, Ent. Ser., 5 {1917), No. 2, pp. 73-136, pis. 11, figs. 9).— This 

 is an extended report of studies of a fulgorid which first came to attention in 

 1905, during which year it appeared in large numbers in the experimental 

 series of canes at Pusa. Since that time it has been a source of serious injury 

 to cane in 1906, 1907, 1910, and 1914. Three chalcidids, two of which have 

 been determined as Ooencyrtus pyrillw and l^etrastichtis pyrillcB, two dryinids, 

 Dryimis pyrillce and Chlorodryiniis pallidus, and a stylopid, Pyrilloxenos coni- 

 pactus, are recorded as parasites. An extended account of studies of the 

 biology of C. pallidus is given. 



The correct name for our apple-grain aphis, A. C. Baker {Science, n. ser., 

 46 {1917), No. 1191, pp. 410, 411).— This is a brief discussion in which the 

 author shows that more than one species of plant lice occurs upon grains and 

 grasses under the name Aphis avence Fab. ; that the one of these species which 

 migrates to apple and related trees where the eggs are laid, must be known as 

 A. prunifolice Fitch ; that another species, the oat aphis, which migrates to bird 

 cherries in Europe, must be known as A. padi L., of which A. avenw Fab. is a 

 synonym ; that the species now known as A. cerasifoliw Fitch migrates to 

 grains and grasses as does A. padi and is possibly the same species ; and that 

 the present placing of the name " prtinifoliw " as a synonym of " cardui L." is 

 not correct. 



The pink and green aphid of potato, Macrosiphura solanifolii, J. S. 

 HousER, T. L. GuYTON, and P. R. Lowry {Ohio Sta. Bxil. 317 {1917), i)p. 61-S8, 

 figs. 22). — This summary of information on M. solanifolii, its life history and 

 habits, host plants, nature and extent of injury, natural enemies, and con- 

 trol measures based upon investigations carried on during 1917, is a much 

 more detailed account than that previously noted (E. S. R., 37, p. 849). In the 

 course of the discussion reference is made to the investigation of this aphid 

 at the Maine Station, reports of which by Patch have been previously noted 

 (E. S. R., 19, p. 662; 25, p. 759). 



It is stated that while the greatest injury to potatoes diu'ing the season was 

 caused by this plant louse, another species, Myzus persicce, did some damage to 

 potatoes, having been taken at Batavia, Liberty Center, Celina, and Canton, 

 Ohio. A small potato plat was killed outright at Canton. 



The insect hibernates as a shiny black egg, probably more frequently on 

 the rose than on any other host. With the coming of summer the eggs hatch 

 into agamic viviparous females, some of which acquire wings and fly to the 

 potato, where they start the series of generations of agamic viviparous females. 

 About 10 days are required for the daughters to become full-grown and begin 



