288 



Some of the third generation become nymphs and later acquire wings. 

 The second generation matures early in April and the third at the 

 beginning of May. The nymphal form is described and compared 

 with European examples. The spring colonies are much attended 

 by ants and are largely preyed uj)on by natural enemies. After May. 

 only the young sexual forms that are deposited by the alatae of the 

 third generation remain. The spring colonies feed both on the stalks 

 and on the lower leaf surface, but the sexual forms only on the latter ; 

 these latter do not mature until late in November. The adults are 

 described from specmiens taken from the valley oak {Qnercus lobata). 

 A species is found m California on alder {Alnus rhonibifolia) which 

 apparently belongs to the same group of Aphids, and of which only 

 the oviparous form has yet been taken. 



CaUipterinella amiulata, Koch, of which Chaitophorus betulae, Buckt., 

 is treated as a synonym, has a wide distribution in America. In 

 California it occurs on imported birch {Betula alba). The oviparous 

 forms are described. 



Aphis neo-mexicana, Ckll., var. pacifica, nov., has been found 

 in California causing curling of the terminal leaves of cultivated red 

 currants. The alate and apterous viviparous female forms are 

 described. 



Stem-mothers of Myzus ribifolii, sp. n., were found on wild flowering 

 currant {Ribes glutinosum), causing curling and blistering of the 

 foliage, similar to the injury caused by Myzus ribis. Descriptions are 

 given of the various forms. These Aphids are not found after the 

 month of May ; presumably the winter eggs are deposited in this 

 month and do not hatch until the following spring. Mature individuals 

 of the second generation have been collected at the end of March ; 

 the stem-mothers would therefore appear to hatch as early as 

 February. 



An Illustration of the Importance of Quarantine against Injurious 

 Insects. — Jl. Econ. Entom., Concord, N.H., x, no. 2, April 1917. 

 p. 298. 



The cotton belt of Brazil, which was pronounced in 1914 after 

 thorough examination to be free of the boll weevil {Anthononms 

 grandis) and the pink bollworm {Gelechia, gossypieJla), was found in 

 1916 to be thoroughly infested with the latter pest. The method of 

 introduction was obviously due to the large quantities of cotton seed 

 shipped to Brazil from Egypt in consequence of the Brazilian Govern- 

 ment's agitation in 1913 for the cultivation of Egyptian cotton. This 

 seed was introduced and disseminated throughout Brazil without 

 fumigation or any other treatment and the consequent infestation has 

 been so heavy that the Government is now seriously considering the 

 passing of an enactment requiring the burning of all the cotton fields 

 in the Republic. 



Controlling the Cottony Cushion Scale in New Orleans. — Jl. Econ. 

 Entom., Concord, N.H., x, no. 2, April 1917, p. 298. 



In 1916 a meeting was held in New Orleans to urge a campaign in 

 rearing and distributing the Australian Coccinellid, iVomws cardinalis, 

 for the control of the cottony cushion scale (Icerya purcJiasi). Th(^ 



