132 



They state that, in Central Africa, human beings and game are 

 known to be infected with trypanosomes identical as regards 

 morphology and pathogenicity in laboratory animals and their 

 development in G. morsitans, that the human trypanosome can be 

 successfully inoculated into game, and that the pecuhar sporadic 

 occurrence of the disease in human beings suggests that they are 

 infected from a widely spread reservoir of infection (the game) rather 

 than from one another. 



They also consider that the hypothesis that man enjoys marked 

 natural immunity, and is in consequence to a great extent resistant 

 to infection with this parasite, affords a satisfactory explanation of 

 the distribution of the disease, of its comparative rarity, and of the 

 fact that Taute's attempt to infect himself failed. 



Knab (F.). CeralojMgoninae sucking the blood of Caterpillars. — Proc. 

 Entom. Soc, Washington, xvi, no. 2, June 1914, pp. 62-36. 



The author has received from Florida some small Diptera with the 

 information that they were sucking the blood of a caterpillar of the 

 well-known papaya hawk-moth, Erinnyis ello, L. ; the flies were of two 

 widely different species, one of them being a biting Chironomid of the 

 genus Forcipomijia, the other a Lauxaniid, Pachycerina flavida, Wied. 

 The Forcipomyia proved to be a new species, which the author 

 describes under the name erucicida. Other records have been made 

 of Forcipomyia attacking caterpillars ; and they have also been known 

 to bite liuman beings and to attack adult insects. 



NicoLLE (C.) & Blanc (G.). Les Spirilles de la Fievre recurrente sont- 

 ils virulents aux phases successives de leur evolution chez le pou ? 

 Demonstration de leur virulence a un stade invisible. [The question 

 of the virulence of the spirilla of recurrent fever in successive 

 stages in the louse. Demonstration of their virulence in an 

 invisible stage.]— C. R. Acad. Sci., Paris, clviii, no. 24, 15th June 

 1914, pp. 1815-1817. 



The results of four series of experiments were positive and show 

 that the spirilla of recurrent fever are virulent in the louse during the 

 period immediately preceding the reappearance of the spirilla in a 

 visible form ; the spirilla are thus virulent in a stage of their life- 

 history when they are invisible. 



MacDougall (E. S.). Insect Pests in 1913. — Trans. Highland <& 

 Agric. Soc, Scotland, 1914. Reprint, 19 pp. 



In the course of this report on injurious insects, the author deals 

 briefly with two forms of lice attacking dogs : — Haemaiopinus pilifenis, 

 which sucks the blood, and biting lice of the genus Trichodectes. The 

 former is the most common and troublesome, and is found specially 

 about the shoulders, loins and base of the ears. A 1 to 2 per cent. 

 creolin bath is effective, the skin being well-rubbed and the bath 

 repeated after six days. A stronger solution than 2 per cent, will act 



