476 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Parasite of Rat-flea.* — E. A. Minchin describes ;i new am<e- 

 boid parasite (Malpighiella refringens g.etsp.n.) which he found in the 

 Malpighian tubes of the rat-flea (Ueratophyllus fasciatus), in which 

 lie was studying the transmission of Trypanosoma lewisi. The new 

 parasite occurs principally in two forms, first an amoeboid form with a 

 single nucleus, and secondly an encysted form with four nuclei. The 

 author distinguishes Malpighiella from Entamoeba. 



Inquiry into Sleeping Sickness.f — David Bruce, A. E. Hamerton 

 and H. II. Bateman have made experiments leading to the following 

 conclusions. Water-buck, bush-buck, and reed-buck can readily be in- 

 fected with a human strain of Trypanosoma gambiense by the bites of 

 infected Glossina palpalis. Yet careful and continued examination of 

 the blood may fail to reveal the parasite. The antelopes mentioned, 

 when infected as described, can transmit the infection to clean labora- 

 tory-bred flies, even eighty-one days after the last feed of the infected 

 flies on a buck. The flies can pass on the virus to susceptible animals. 

 It follows that antelope living in the fly-areas are "potential" reservoirs 

 of the virus of sleeping sickness, but up to the present no antelope bas 

 been found naturally infected. In another paper J it is shown that the 

 Uganda fowl cannot act as a reservoir of the virus of sleeping sickness. 



Protozoan Parasites from Trichoptera.§ — Doris L. Mackinnon 

 describes an interesting new Flagellate Embadomonas agilis g. et sp. n., 

 from caddis-worms. It is a slipper-shaped form with one flagellum ; 

 the posterior end is pointed, tbe anterior end is blunt and rounded, and 

 bent back at an angle with the long axis of the body. A large cytostome 

 occupies almost all tbe anterior half of the body. The slender flagellum 

 arises from a basal granule on the anterior margin of the cytostome. 

 The nucleus is a diffuse mass containing several chromatin clumps ; 

 it lies in tbe extreme anterior end, in front of the cytostome. Tbe 

 caddis-worms also yielded Grithidia campamdata Leger, a species of 

 Entamoeba, Gurleya legeri, Trichomasiix trichopterorum, etc. 



Trypanosome Studies. || — F.K. Kleine and M. Taute have endeavoured 

 to discover whether there is a sexual development of Trypanosoma gam- 

 biense within Glossina palpalis. There is no congenital transmission of 

 the Trypanosome from fly to fly. Flies reared in the laboratory and once 

 infected were studied. What the authors regard as male and female 

 forms are carefully described. There is also a discussion of various 

 species of Trypanosome that occur in the Tse-tse, e.g. T. grayi ; of the 

 unimportance of Glossina morsitans as a host of T. gambiense ; of the 

 habits of G. palpalis ; and many other points of interest. 



Trypanosoma rotatorium G-ruby.lf — W. Lebedeff re-describes this 

 Trypanosome of the frog, which is marked by striking polymorphism. 

 There are four principal forms: "indifferent," "ordinary," "sterile," 



* Festschrift 'Richard Hertwig, i. (1910) pp. 291-302 (1 pi.), 

 t Proc. Hoy. Soc, Series B, lxxxiii. pp. 311-27. 

 t Tom. cit., pp. 328-34. 



§ Parasitology, iv. (1911) pp. 28-38 (1 pi. and 8 figs.). 

 || Arbeit, k. Gesund., xxxi. (1911) p. 1-58 (5 pis.). 

 Tf Festschrift Richard Hertwig, i. (1910) pp. 399-43G (2 pis. and 9 figs.). 



