ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 685 



micro-nuclei lying between them and the anterior ends from which long 

 wavy flagella protrude. The complete cycle is spent in the insect host 

 and has no connection with any blood parasite. The early stages and 

 their mode of development, together with the constant anterior position 

 of the blepharoplast and the absence of the fully developed undulating 

 membrane, suggest that the parasite is distinct from the Trypanosomata. 

 There is at present no evidence of a sexual cycle or of the infection 

 affecting the offspring. Some notes are also given upon certain stages 

 in the hfe-cycle of a species of Criihidia found in a small water-bug. 



Gregarines of United States.* — Howard Crawley supplies a third 

 contribution on Polycystid Gregarines, all of which appear to have been 

 found within the State of Pennsylvania. Leidy's Gregarina acltetcp- 

 abbreviatm from the common cricket is re-described and figured, and 

 several new species, mostly from Orthoptera, are recorded and described. 



Amoebae in Abscesses.f— P. Verdun and L. Bruyant describe cells 

 resembling Amceba coU in the pus from two malar abscesses in man. 

 No bacilli could be demonstrated, but in smears curious polynucleated 

 elements, some of which were 50 /* in diameter, were observed. 



* Proc. Acad. Nat. Sci. Philadelphia, lix. (1907) pp. 220-8 (1 pL). 

 t C.R. Soc. Biol. Paris, Ixiii. (1907) pp. 161-3. 



