160 



occurring in the same pools as C. erythrocephala ; Anopheles -pseudo- 

 punctipemiis,T>yav,aiid A. occidentalis, D. & K., favouring permanent 

 reedy pools. A. punctipennis, Say, has been previously recorded in 

 this district, but was not found in the collection under consideration. 



Dyae (H. G.) & KxAB (F.). Eggs and Ovipositon in Certain Species 

 of Mansonia (Diptera ; Culicidae). — Insecutor Inscitiae MenstruuLS, 

 Washington, D.C., iv, nos. 4-6, April-June 1916, pp. 61-68, 2 figs. 

 [Received 9th August 1916.] 



The egg-masses of Taeniorhynchus (Mansonia) perfurbans, T. fascio- 

 latus and T. arribalzagae differ slightly in shape, but agree in the fact 

 that they float on the surface of the water, with one side usually resting 

 against an aquatic plant. The eggs of T. titillans and T. humeralis, 

 sp. n., are peculiar in that they have been found attached to the under- 

 surface of the leaves of Pistia, being generally placed in masses between 

 the veins. The method of oviposition of T. titillans is described. 

 In the case of females kept under observation, egg-laying was found to 

 follow a blood meal after an interval of four or five days. 



Cousins (H. H.). General Observations. — A?in. Rept. Jamaica Dept. 

 Agric. for the Year ended 31st March 1916, Kingston, 1916, 

 pp. 1-4. [Received 14th August 1916.] 



Cases of tick-fever were few and slight. The dipping tank had 

 been in regular use since June 1915 with very satisfactory results. 

 The dipping fluid consisted of 2 lb. of arsenite of soda (80 per 

 cent.) and 3 lb. paranaph per 100 gals. The consumption of material 

 for nine months consisted of 73 lb. of arsenite of soda and 1101b. 

 of paranaph, costing 525. for that period, equal to £3 10.s. Od. per 

 annum for a herd averaging 180 head, or 4f (/. per head per annum. 

 From continued use, a reducing action on the arsenic is maintained 

 which greatly economises the consumption of arsenite of soda. All the 

 cattle, both imported and native, young and old, were dipped regularly. 

 It was however found undesirable to dip cows about to calve. In two 

 cases cows suffered somewhat from arsenical poisoning, though no 

 deaths resulted from the dipping. The work of dipping becomes more 

 rapid as the cattle get accustomed to the tank. 



CtRiffitts (T. H. D.). a mosquito collecting device.— JZ. Amer. Med. 

 Assoc, Chicago, Ixvii, no. 2, 8th July 1916, p. 117, 1 fig. 



This mosquito collecting apparatus is an apphcation of the principles 

 of the fly trap. In the size recommended it consists of a glass or 

 celluloid tube about 1 inch in diameter and 5 inches long, open at both 

 ends ; one end, when in use, is closed by a cork or other stopper. The 

 other end, which contains the trap, consists of a cork stopper to fit the 

 tube, three-eighths of an inch thick, having a central opening half an 

 inch in diameter to accommodate the trap tube. A small glass or 

 celluloid tube about three-fourths of an inch long, of the shape of a 

 truncated cone to fit tightly in the opening in the cork, is required. 

 The outer end should be half an inch in diameter and the inner end 

 three-eighths of an inch. The entrance of the mosquitos may be 

 observed through the glass or celluloid. In making a catch the trap 

 end of the tube is placed over the resting mosquito. On an average 

 each capture took three seconds. 



