New York Agricultural Experiment Station. 487 



Antennse olive green, slender, 2.85 mm. in length (Joint III, 0.65 mm.; 

 IV, 0.4 mm.; V, 0.4 mm.; VI, 0.125 mm.; VII, 1.1 mm.). Tbii-d, fourth 

 and fifth joints tuberculate. Seusoria very numerous. Eyes deep red. 

 Legs yellowish green with the exception of the anterior third of the 

 femora, tips of the tihire and the tarsi, which are dusky. Nectaries yel- 

 lowish green, cylindrical, slightly dilated, 0.22 mm. in length. Veins dark, 

 stigma light yellow or yellowish gi-een, 8 mm. in length. (Described from 

 one specimen in balsam.) Plate XXVIII, figs. 1 and 2. 



The eggs are shining black. A few were found on the twigs 

 during the latter part of October. They were much more numer- 

 out about a month later. 

 Partial UhliograpMcal list: 



1857. Koch, C. D. " Die Tflanzenlause— Aphiden," pp. 39-40. (Rliopalosi- 

 phmn ribis Linn.) Descriptions. 111. apterous . and winged viviparous 

 females. 



1867. Walsh, B. D. Practical Entomologist, Vol. II, p. 106. Method of 

 work. 



Ibid, pp. 109-110. Gives account of work of Coccinellidse against 



plant lice. 

 Riley, C. V. Prairie Farmer, Vol. V, n. s., p. 69. Means against. 



1869. Walsh. B. D. American Entomologist, Vol. I, p. 250. 



1870. Riley, C. V. Second Missouri Report, p. 110. 

 1873. Riley, C. V. Sixth Missouri Report, p. 46. 



1876. Bucton, G. B. Monograph British Aphides, Vol. I, pp. 180-181. 

 Descriptions apterous and winged viviparous females and pupa. Illustra- 

 tions of apterous and winged viviparous females. 



1878. Thomas, Cyrus. Third Report (Eighth Annual Report of the 

 Entomologist of 111.) pp. 76-78. Gives Bucton' s descriptions with notes on 

 possible varieties of M. ribis. 



1883. Saunders, J. H. Insects Injurious to Fruits, p. 351. Brief notes, 



1887. Oestlund, O. W. Synopsis of the Aphididse of Minn., p. 73 (Bui. 

 No. 4 Geological and Natural History Survey of Minn.) Technical descrip- 

 tions. 



1894. Harvey, F. L. Annual Report Maine Agricultural Experiment 

 Station, 1894, p. 109. Notes, injury caused to gooseberry bushes. 



Other species attacMng the currant. — Rhopalosiphmn rihis* Linn. 

 This species is especially common on the black currant. 



It also attacks the red currant. The black currants in the Sta- 

 tion garden were badly infested last season. During the latter 

 part of July the lice left the currants. Return migrants (Plate 

 XXVIII, fig. 4), appeared on the bushes early in October. The 



•Identified by Mr. F. A. Slrrlne. I 



