11 



chinen^is, L. (cowpea wee\-il), CaJandm onjzae, L. (rice wee\'il), and 

 Sihamis surinamemis, L. (saw-toothed grain beetle), sumve for 35, 

 60 and 120 minutes respectively. Experience has shown that there 

 is practically no danger of injuring germination in seeds that have 

 been well matured and dried before being treated with carbon 

 bisulphide. 



Walton (W. K.). How to detect Outbreaks of Insects and save the 

 Grain Crops. — U.S. Dept. Agric, Washington, D.C.. Farmers' 

 Bull. no. 835. June 1917, 24pp., 14 figs. [Received 7th November 

 1917.] 



This bulletin has been written for the information of growers of 

 cereal crops and urges the necessity for vigilance and ^-igorous action 

 at the beginning of insect outbreaks in order to avoid a great j)art of 

 the annual losses due to grain pests. Methods of control are discussed 

 for Mayetioh (Phytophaga) destnictor (Hessian fly) ; Blissus leucop- 

 Ura (chinch bug) ; Cirphis unipuncta (army worm) ; cutworms, 

 such as LycopJiotia {Peridroma) margaritosa (variegated cutworm) ; 

 Mehnoplus spp. (grasshoppers) : Lachwsterna spp. (white grubs) ; 

 Sphenophorus maidis (maize billbug) and S. aequalis : Aphis nmidi- 

 radicis (com root-aphis) ; and wireworms, such as Corymbites noxius. 

 A dailv survev of the fields during the active growing season is recom- 

 mended, and any serious outbreak should at once be reported to one 

 of the federal entomological field stations of which a list is given. 



RoBiNSox (E.). Coccidae of the Philippine Islands. — Philippine Jl. 

 Science, Manila, xii, Sec. D, no. 1, January 1917, pp. 1-43, 

 6 plates. [Received 8th November 1917.] 



This paper attempts to collect all obtainable information concerning 

 the kno^vn species and available specimens of Philippine Coccidae. 

 Though more than 70 species are recorded, it is believed that these 

 represent only a portion of the abundant Coccid fauna of the Philip- 

 pines. Most of the species here dealt with come from the Island of 

 Luzon. 



A useful index to the food-plants of the species recorded is appended. 



MuiR (F.). The Derbidae of the Philippine IsXzji^.— Philippine 

 Jl. Science, Manila, xii. Sec. D. no. 2, March 1917, pp. 49-105, 

 1 plate, 4 figs. [Received 8th November 1917.] 



The Phihppine Islands are very rich in Derbids ; the present paper 

 records 98 species of 39 genera ;" of these 62 species are described as 

 new and seven new genera are erected. A key to the subfamihes is 

 given. Very httle is known of the hfe-histories of these insects, the 

 nymphs of which are found in rotten wood or under old bark. Prou- 

 tista nwestu, Westw., is frequently found on sugar-cane in Java, the 

 Phihppines and Formosa. 



The author advocates the estabhshment of an entomological station 

 m some such locahty as Mount Maquihng, near Manila, where 55 

 species of Derbids were taken. There are manv interesting problems 

 presented by the insect fauna of the Philippines, the solution of which 

 will mean the sa\dng of valuable crops all over the tropics. Hitherto, 



