109 



Taliaferro (W. H.). Variation and Inheritance in Size in Trypano- 

 so7na lewisi. I. Life-cycle in the Rat and a Study of Size and 

 Variation in " Pure Line " Infections, n. The Effects of Growing 

 " Pure Lines " in Different Vertebrate and Invertebrate Hosts and 

 a Study of Size and Variation in Infections occurring in Nature. — 

 Proc. Nat. Acad. Sci. U.S.A., Washington, D.C., vii, nos. 5 & 6, 

 May & June 1921, pp. 138-143 & 163-168, 2 figs. 



Trypanosoma leimsi reaches an " adult " stage in its development 

 in the rat in about 25 days after it appears in the blood. After this 

 stage is reached there is practically no division or growth, as a result 

 of which the organisms show a very low coefficient of variation in 

 " pure line " infections, provided they are measured after the " adult " 

 stage is reached. Passages of the " pure line " from rat to rat are 

 not followed by any significant changes in the coefficient of variation, 

 whereas passage through the flea results in a marked increase in the 

 coefficient of variation, showing that the " pure line " breaks up into 

 diverse lines following such passage. In nature probably a large 

 nimiber of " pure lines " occur, differing among themselves, but each 

 of which is constant in size. 



Peters (B. A.). Bile Salt as a Vehicle for a Pediculicide. — Brit. Med. 

 JL, London, no. 3190, 18th February 1922, p. 264. 



As bile salts are stated to assist the passage of fat emulsions through 

 the mucous membranes by reducing surface tension, it was thought 

 that they might have the same effect on the covering of eggs of lice 

 [Pediculus humanus]. A compound of 10 gm. sodium taurocholate 

 completely dissolved in water up to 950 cc, to which 50 cc. of eucalyp- 

 tus oil are added, and the whole well shaken, proved effective for 

 destroying lice on the head. Some strains of lice are apparently 

 more resistant than others ; in some cases very heavy infestations 

 were completely sterilised with one apphcation, whereas other lightly 

 infected cases required three applications. Possibly the solution of 

 bile salts may be combined with some substance more poisonous to 

 the eggs than eucalj^tus. 



Taylor (F. H.). Australian Phlebotomic Diptera : New Culicidae, 



Tabanidae and Synonsmiy. — Proc. R. Soc. Victoria, Melbourne, 

 xxxii, pt. 2, September 1920, pp. 164-167. 



The new species described are the Culicid, Uranotaenia albofasciata, 

 and the Tabanids, Silvius distinctus and Tabanus geraldi, from the 

 Northern Territory. 



The new generic name Phibalomyia is suggested to replace Ela- 

 phromyia, Taylor nee Bigot [R.A.E., B, vi, 118], as the latter is 

 preoccupied. Corizoneura kurandae, Taylor [loc. cit.] appears to be 

 identical with Pseudotabanus queenslandi, Ricardo. The names 

 Tabanus strangmanni, Ric. [R.A.E., B, iii, 26] and T. mastersi, Tayl. 

 [R.A.E., B, vi, 118] apparently both refer to the same species. 



Howard (L. O.). Report [1920-21] of the Entomologist.— C/.5. Dept. 

 Agric. Bur. Ent., Washington, D.C., 1st August 1921, 33 pp. 

 [Received 24th January 1922.] 

 [Our attention has been called to an error in this report, which has 

 been reproduced in the abstract of it [R.A.E., B, x, 68]. The oint- 

 ment recommended against Hypoderma should consist of a mixture of 

 vaseline and iodoform, not iodine. — Ed.] 



(6363) K 



