ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 15 



Development of Trypanosoma noctuse in the Gnat.* - - H. M. 

 Woodcock describes the developmental stages which arc passed through 

 in the female gnat (Gulex pipiens) by Trypanosoma noctuse of the Little 

 Owl Trypanomonad fusiform forms are the earliest developmental 

 stages ; these are transformed into an elongated trypaniform condition ; 

 there is a final much attenuated propagative form. Another line of 

 development proceeds also from the original type of trypanomonad indi- 

 vidual, by a modification in form and in mode of division. A club- 

 shaped form with markedly unequal division results. In the mosquito 

 there is the same club-shaped type, and this line of development leads 

 ultimately to the production of small pear-shaped or oval parasites, with 

 the nuclei close together and situated about the middle of the body, or 

 nearer the posterior end, and with the flagellum drawn back but with 

 practically no membrane. This is the haptomonad phase, which serves 

 for attachment and coincident multiplication. The early development 

 of Trypanosoma noctuse in the mosquito culminates in the production of 

 two distinct and extreme types — thread-like and haptomonad — the 

 former being probably the propagative individual. After comparing 

 Trypanosoma noctuse with the two other parasites of the Little Owl, viz. 

 H alter idium noctuse and Leucocytozoon ziemanni, Woodcock comes to the 

 conclusion that the three are entirely distinct. 



New Hsematozoon.f — Ed. Chatton and G. Blanc describe Pirhemo- 

 eyton tarentolse from the blood of the Gecko, Tarentola mauritanica, which 

 also contains Leishmania tropica. The new parasite begins within the 

 blood-corpuscle as a nucleated spherical body, about 1 /x in diameter, 

 and grows into a pyrif orrn body 3 to 4 /x in length by 1 • 5 to 2 /a in 

 breadth. It is like a microsporidian spore, but has no envelope. It is 

 situated in a vacuole in the cytoplasm. The parasitized blood-corpuscle 

 shows in its cytoplasm a refractive inclusion. 7 to 8 /x in diameter, which 

 seems to be due indirectly to the Haematozoon. 



* Quart. Journ. Micr. Sci., lx. (1914) pp. 399-433 (3 pis. and 1 fig.), 

 t C.R. Soc. Biol. Paris, lxxvii. (1914) pp. 496-8. 



