313 



the beetles in a cheese-cloth net when they first appear, or spraying the 

 plants with 3 lb. arsenate of lead to 50 U.S. gals, of Bordeaux mixture. 

 Diahrotica graminea, Baly (green beetle), attacks Amaranthus spinosus, 

 bean, beet, sugar-cane, castor-oil bean, maize, cowpeas, cucumbers, 

 ■egg-plants, and many other plants, the larvae feeding on the roots, 

 while the adult beetles swarm over the foliage and flowers, frequently 

 injuring the pistils and preventing setting of the fruit. The entire 

 life-cycle occupies only about 36 days, the beetles breeding 

 continuously throughout the year. Ci/las formicarw.s (sweet potato 

 root-borer) is only abundant in certain localities in Porto Rico. The 

 eggs are deposited in small cavities eaten out of the stalk of potato 

 plants ; the larvae on hatching burrow down the stalk to the roots, 

 where they pupate. The life-cycle occupies about a month and the 

 .generations are continuous, sometimes destroying an entire crop before 

 the potatoes are ready to harvest. All traces of the old plants remaining 

 after the crop has been gathered should be destroyed by burning and 

 rotation of crops is recommended as a preventive of re- infestation. 

 The grey weevil, Euscepes {Cryptorrhynchus) batatae, has a very similar 

 life-history and should be controlled in the same way. 



MuiR (F.). Additions to the Known Philippine Delphacidae (Hemiptera). 



—Philippine Jl. Science, Manila, xi, Sec. D, no. 6, November 

 1916, pp. 369-385. [Received 19th May 1917.] 



This paper describes 40 species, 15 of which are new. A key to the 

 Philippine species of the genus PerkinsielJn is given. The importance 

 of this genus lies in the fact that all species at present known live on 

 sugar-cane, which could not be grown over the region of their distri- 

 bution were they not held in check by parasites. This is specially true 

 of P. saccharicida, which was introduced into the Hawaiian Islands, 

 and only controlled by the introduction of parasites. The Philippine 

 species are P. lineata, sp. n., on sugar-cane; P. saccharivora, sp. n., 

 P. pseudosinensis, sp. n., P. bakeri, sp. n., on sugar-cane and sorghum ; 

 P.fuscipenms, sp. n., and P. vastatrix, Bred., common on sugar-cane. 

 Other species described are Stenocranns agamopsyche. Kirk., on sugar- 

 cane and grasses ; S. jMcificus, Kirk., on grasses ; Enmetopinaflavipes, 

 Muir, on sugar-cane ; Delphax kolophon, Kirk., D. eupompe, Kirk., 

 D. aJbicollis, Motsh., D. anemonias, Kirk., and Peregrinus maidis, 

 Ashm., one of the commonest leaf-hoppers, the eggs of which are 

 parasitised by a Mymarid {Paranagrus sp.) and which might other- 

 wise become a very serious pest of maize. 



OsHiMA (M.). A Collection of Termites from' the Philippine Islands.— 



Philippine Jl. Science, Manila, xi, Sec. D, no. 6, November 1916, 

 pp. 351-366, 2 plates. [Received 19th May 1917.] 



This systematic paper describes 13 species of termites, including 

 four new species, and two species not previously recorded from the 

 Philippines. These are: — Eutermes gracilis, sp. n., E. manilensis, 

 sp. n., E. {Hospiialitermes) hospitalis, Hav., E. {Hospitalitermes) 

 saraiensis, sp. n., E. (Ceylonitermes) macgregori, sp. n., Rhinotermes 

 (Schedorhinotermes) longirostris, Brau. 



