598 THE ANIMAL PARASITES OF JUAN 



as nuche or gusano in New Granada, the ura in Brazil, and the macaw fly in 

 Cayenne. It occurs in Central and South America and the West Indies. According 

 to Goudot the fly is found in great numbers on the borders of large woods and 

 lands covered with underwood. 



[It is seldom that more than one larva is found in each individual. It is generally 

 found in the arm and leg, but now and then the face. The perfect insect has never 

 been bred from a larva removed from a human being, so that there is still uncertainty 

 as to the actual species. D. cyaniventris is 11 to 12 mm. long, has an ochraceous 

 buff-coloured face, dark grey thorax, metallic dark blue to purple abdomen, and 

 brownish wings. D. noxialis is somewhat larger. 



[In the Journal of Tropical Medicine and Hygiene, January 15, 1905, viii, p. 23, 

 reference is made to this Oestiid in Trinidad, where it is called the "mosquito 

 worm." One case here recorded showed no fewer than four worms on the chin and 

 one on the hand. It is here stated that the fly never attacks man or animals directly, 

 as it is said to do by Scheube, but that the eggs are deposited on leaves and branches 

 in wooded lands and forests, and thus man, hunting dogs and wild animals in 

 passing through get the larvae deposited on them accidentally. The affection is 

 common in Trinidad. Mention is made that a little i in 40 carbolic lotion syringed 

 into the aperture in the skin over the worm quickly killed it. 



[The cattle worm, or founzaia ngombe, is the name given to a larva which 

 develops beneath the skin of oxen and men in Central Africa, especially amongst the 

 natives and stock of Unyamonezi. According to P. Dutrieux, the egg is laid by a 

 large fly that accompanies cattle. It is unknown between the central plateau or the 

 Ugogo and the East Coast. F. V. T.] 



CAVICOLOUS OESTRIM:. 



The forms belonging to this group inhabit as larvae the nasal and 

 frontal sinuses of ruminants, Equidcv and Proboscida', which they leave 

 for the pupal stage. The larva of 



Genus. Oestrus, Linnaeus, 

 Oestrus (Cephalomyia) ovis, L., 



occurring in sheep, has also been observed in man in six cases in the 

 nose and larynx (Saitta in Gaz. d. Osp. d. Clinic, 1903, No. 128). So 

 far as is known, the eggs are deposited in the nasal cavity. 



[Oestrus ovis frequently occurs in man. MM. Sergent (Ann. de tlnst. Pasteur, 

 1907, pp. 392-399) mention that they lay their ova on the noses, eyes and mouth of 

 humans in Algeria whilst flying, but that they disappear after three to ten days or 

 the inflammation produced by them. Portschinsky (Mem. Bur. Ent. Sci. Com. Cent. 

 Bd. Land Adm. and Agric., 1913, x, No. 3, p. 63) also gives cases. He doubts 

 that ova are laid on the nose ; evidently the Russian habit is anomalous, for the 

 Sergents, Collings and myself find ova laid as a common occurrence. I have often 

 seen them on the nose of sheep. This fly also occurs in the Argentine (Series, in 

 Gaceta Rural, April, 1913, vi, pp. 759-761). 



[The tamne or thimni of the Kabyles, a human myiasis of the Tuareg mountains 

 in the Sahara, is caused by Oestrus ovis. Here the larvae are said to be ejected on 

 to the conjunctival and nasal mucous membrane of humans. 



[Ed. and Lt. Sergent (Bull. Soc. Path, e.rot., 1913, vi, No. 7, pp. 487-488) report 

 their attack from the Ahaggar mountains, in Central Sahara. The Tuareg name for 

 -the fly, tamne, is the Targui form of the word thimni used by the Kabyles. F. V. T.] 



