ON A TRYPANOSOME FOUND IN THE BLOOD OFUROLONCHA STRIATA L.

BY Josh PEREIRA

Received October 11, 1940(Communicated by Prof. Col. I. Froilano de Mello)

No parasite has hitherto been recorded in the blood of UROLONCHASTRIATA L. So, the trypanosome here described is a n. sp. which will benamed Trypanosoma Urolonchae.' Only two trypanosomes have beenfound: monomorphic, with slight individual variations.

Posterior pole expanded in a rostrum-like appendage with a very thinpoint. The micronucleus roundish, strongly stained in deep violet by MayGrunwald-Giemsa, situated at some distance from this point and surroundedby a more or less elliptic vacuole. Nucleus large, stained in rose, situated

nearly in the middle zone of the body, more or less quadrangular, occupyingthe whole breadth of the parasite and with the chromatin disposed in two or

Beside this trypanosome, Uroloncha Striata harbours also an Ha'moproteas whose descrip-tion and evolutice cycle will be dealt with in a further note by Colonel de Mello in collaborationwith the present writer and his colleague E. de Figueiredo.

33B4 F

34

Jose Pereira

three longitudinal bands. Undulating membrane starting from the micro-nucleus and with the bordering flagellum well stained in rose in one speci-men, scarcely visible only in the anterior third in the second specimen andlacking the rose tinge described above. The free flagellum is very thin andmeasures circa 1/5 of the legnth of the body. Protoplasm stained in blue,not uniform, but vacuolated, especially near the nucleus.

Measurements in Microns Specimen II

From the point of the rostrum to the micronucleus .. 6 4, 5

From the micronucleus to the macronucleus .. .. 8, 5 5

Length of the macronucleus .. .. .. 3, 5 2, 5

From the anterior border of the macronucleus to the anteriorpole .. .. 17, 5 8, 5

Free flagellum .. .. .. 7, 1 5, 1

Total length of the body without free flagellum .. 35, 5 20, 5

Breadth (without counting the undulating membrane) 4, 1 4, 5