452 EXPERIMENT STATION EECORD. [Vol.43 



A synopsis of the Aphididfe of California, A. F. Swain (Univ. Cal. Puha. 

 Ent., 3 (1919) No. 1, pp. 221. flffs. 5i7).— The author recognizes 182 species, 

 representing 48 genera of aphids, as occurring in California. All the present 

 records of California species are brought together. Tables are given for the 

 separation of the subfamilies, tribes, genera, and species. Keys to the Genera 

 and Tribes of Aphidida^ by P. van der Goot (pp. 154-158), and a Host Plant 

 List of California Aphididae (pp. 159-177) are appended. An index to genera 

 and .species is included. 



Notes on oriental Aphididae, P. van der Goot (Tiidschr. Ent., 61 (1918), 

 No. S-4, pp. 112-127, figs. 5). — This is a contribution to the knowledge of the 

 geographical distribution of aphids, in which the autlior reports upon the results 

 of limited collections made at Singapore and Hongkong. Ten species were 

 collected at Singapore, of which 3 are described as new, and 8 at Hongkong, 

 of which 1 is described as new. 



Cypress bark scale, F. B. Herbert (U. S. Dept. Ayr. Bui. 838 (1920), 

 pp. 22, pis. 6, figs. 5). — The cypress bark scale (Ehrhornia cupressi Ehr.) 

 infests a large percentage of the Monterey cypress trees in California. Monterey 

 cypress is one of the most popular shade and oi'namental trees in California, 

 where it is planted separately or in hedgerows and often trimmed to formal 

 shapes. Its attack caused a gi-eat deal of injury, particularly to the thickly 

 planted hedgerows and windbreaks, and in the San Francisco Bay region, it 

 ranks first among the pests of the Monterey cypress. 



" It was found in the course of a thorough investigation that the scale insect 

 was not a native of the Monterey cypress, but of the incense cedar which 

 occurs in the mountains of California, Nevada, and southern Oregon. From 

 this host it has probably spread to the Monterey cypress by the transportation 

 of incense cedar seedlings or rustic timber to the regions infested. The char- 

 acteristic injury caused by this insect begins to show on 1 or 2 limbs and slowly 

 spreads to the rest of the tree. The foliage turns first yellow, then red or 

 brown, giving the tree a very dilapidated appearance. After a few years the 

 whole tree dies. The food plants of the cypress bark scale are INIonterey 

 cypress, Arizona cypress, Guadalupe cypress, and incense cedar. 



" The larvae are small oval bodies, pale yellow in color, which are active for 

 a short time after hatching. They attach themselves in crevices of the bark 

 and are soon enveloped in a white cottony secretion. As they reach maturity 

 they become reddish brown in color and nearly spherical in shape. 



" Oviposition begins in ths spring and lasts throughout the summer. The 

 eggs hatch into larvse in less than an hour and soon attach themselves. The 

 females reach maturity in the fall and hibernate over the winter, starting ovi- 

 position in the spring. The males appear in the late fall or early winter to 

 mate and die. There are several insects which prey upon the cypress bark scale, 

 none of which, however, is abundant enough to control the scale insect. Con- 

 sequently remedial measures have to be adopted. A 12.5 per cent solution of 

 a high-gravity miscible oil is the spray recommended. To obtain complete 

 control it is necessary to spray twice in the early fall, once in August, and once 

 in the latter part of September." 



Coccid.Te from the island of Sao Thome, A. F. de Seabra and P. Vayssiere 

 (Bui. Sac. Ent. France, No. 10 (1918), pp. 162-1&J, ; abs. in Inteiyiatl. Inst. Agr. 

 [Rome], Internatl. Rev. Sci. and Fract. Agr., 10 (1919), No. 3, pp. 360, 361).— 

 This is an annotated list of 14 .species occ'uring in Sao Thome, Africa. 



Contributions toward a monograph of the sucking lice, G. F. Ferris 

 (Leland Stanford Jr. Univ. Pubs., Univ. Set:, 1919, No. 1, pp. 51, figs. 32). — 

 This paper, the first of a series to be published, deals with the genera En- 



