22 



milking giving the best results. In certain periods of the test the use 

 of a repellent produced an increased milk supply of from 4 to 6 per 

 cent. The repellent used consisted of 1 U.S. gal. each of kerosene, 

 shghtly sour milk, fish-oil and strong hot soap solution made from 

 about f cake laundry soap, with the addition of 6 oz. citronella oil. 

 The kerosene and milk are emulsified, then the fish-oil and soap solution 

 separately ; these two are then thoroughly mixed and the oil stirred 

 in when cold. One gallon of this stock is used to two of water. 



Dyar (H. G.) & Barret (H. P.). Descriptions of hitherto unknown 

 Larvae of Culex (Diptera, Culicidae). — Inseciitor Inscitiae 

 Menstnius, Washington, D.C., vi, no. 7-9, July-September 1918, 

 pp. 119-120. 



The larvae dealt with in this paper are those of Culex peccator, 

 D. & K., and C.floridanus, D. & K. The former were found in fairly 

 large numbers associated with C. saxafilis, Grossb., beneath the over- 

 hanging bank of a stream and in small pools in marshy ground. 



The larvae of C. fioridanus, not previously recorded as occurring 

 • further north than Georgia, were found in very small numbers in a 

 temporary rain-pool, their scarcity being probably due to the presence 

 of predaceous larvae. They somewhat resemble Psorophora discolor, 

 with which they occur, and have the same habit of lying inverted at 

 the bottom of the pool. 



Dyar (H. G.). New American Mosquitos (Diptera, Culicidae). — 



Insecutor Inscitiae Menstruus, Washington, D.C., vi, no. 7-9, 

 July-September 1918, pp. 120-129. 



The new species dealt wnth in this paper are :■ — Wyeomyia aphobema. 

 the larvae of which were found in Bromeliaceae in March in Surinam ; 

 Culex surinamensis, bred from larvae in a rock pool and in a water 

 barrel in March in Surinam ; Culex usquatus, many larvae of which 

 were found in Surinam, in very dirty puddles, water barrels, etc., 

 sometimes preyed upon by Lutzia albostigma, and always found breeding 

 near houses in February ; Culex (Melanoconion) zeteci, from the Canal 

 Zone, Panama, in January ; Culex (M.) dunni, from Panama, bred 

 from larvae associated with Pistia ; Culex {Choeroporpa) tecmursis, 

 taken at light in Panama in May and June ; C. {Helcoporpa, subgen. n.) 

 menytes, from Panama in March ; C. (Mochlostyrax) alogistus, from 

 Surinam, bred from larvae in temporary pools, lying on their backs on 

 the bottom ; Psorophora elites, taken in Texas in August ; Aedes 

 (Ochlerotatus) eucephaJaeus, bred from larvae lying on their backs on 

 the bottom of temporary rain-pools in sandy land, Surinam, in March ; 

 A. (0.) camposanus from Ecuador ; and A. {Taeniorhynchus ?) thelcter 

 from Texas in August. 



Dyar (H. G.). Notes on American Anop)heles (Diptera, Culicidae).— 



Insecutor Inscitiae Menstruus, Washington, B.C., vi, no. 7-9, 

 July-September 1918, pp. 141-151. 



The view is expressed that the genera of Anopheles erected by 

 Theobald and others and based on scale-characters, which have been 

 abandoned by some recent WT:iterSs should be retained as subgenera. 



