588 THE ANIMAL PARASITES OF MAN 



the nose and mouth of a patient in Victoria Hospital. Others were found in the 

 vagina of another patient. Out of the four patients attacked, two occupied the 

 same bed, one after the other, and a third the next bed to it. The other case was 

 in a more remote part of the hospital. There are numerous records of this fly 

 attacking man. It occurs from the Argentine to Texas. F. V. T.] 



Chrysomyia viridula, Rob. Desv. 



[This species is somewhat larger than the former; the body is metallic bluish- 

 green, the dorsum of the thorax with three blackish, longitudinal stripes, and the 

 face ochraceous ; about 10 mm. long. Austen records this species from man, 

 Dr. Daniels having bred it from larvae from a sore on a human being in New 

 Amsterdam, British Guiana. Dr. Laurence also bred it in Trinidad. In the latter 

 case between 100 and 150 maggots were discharged from the nose of a woman 

 suffering from facial myiasis (Brit. Med. Journ., January 9, 1909, p. 88 + fig.). 

 F. V. T.] 



Genus. Lucilia, Rob. Desv. 



Lucilia nobilis, Meig. 



The larvae were observed by Meinert in Copenhagen in the auditory meatus 

 of a person who, after taking a bath, fell asleep in the open air, and on waking 

 felt singing in the ears, and had a sensation as if there were water in the auditory 

 canal. During the next days severe pains set in, and there was a discharge of 

 blood and pus from both ears, as well as from the nose. On washing out the 

 meatus the maggots made their appearance. 



Lucilia cccsar and L. sericata have also been observed in the larval state in 

 man (Thompson, Hope, Henneberg and Calendoli, Napoli, 1907). 



[This golden-green fly usually lays its eggs on decomposing organic matter ; 

 now and again it lays its eggs in wounds on man. F. V. T.] 



Genus. Pycnosoma, Brauer and v. Bergenstamm. 



The species of this genus have a general resemblance to the Lucilias and 

 Chrysomyias, but the body is stouter and the abdomen banded. The genus can be 

 distinguished from Chrysomyia by the absence of the three thoracic stripes and 

 by the eyes of the male, in which the facets forming the upper portion are much 

 enlarged, whereas in Chrysomyia they are not noticeably larger. Austen also points 

 out that the sterno-pleural bristles in Pycnosoma are I : I, in Chrysomyia 2:1. 

 The genus is found in tropical Asia and Africa only. All records of Chrysomyia 

 (Compsomyia) in India must be referred to this genus. Bezzi and Stein (" Katalog 

 cler Palaarktischen Dipteren," 1907, iii, p. 543), however, regard the two as 

 synonymous. 



The larvae are frequently found in the nostrils of man and burrow into the sinus, 

 but normally they live on decaying animal matter. 



Pycnosoma forms the so-called Indian screw-worm. Patterson (Ind. Med. Gaz.^ 

 October, 1909, xhv, No. 10) records the case of a woman at Tezpin, Assam, from 

 whom as many as 100 larvae were removed at one time, and later the left orbital 

 cavity was found packed with hundreds of maggots; eventually the patient died. 

 It is possible that this, however, was due to a species of Sarcophaga. Austen 

 undoubtedly records this genus causing nasal myiasis in India (Trans. Soc. Trop. 

 Med. and Hyg., iii, p. 235). At Dehra Doon, U.P., a woman discharged 100 

 larvoe from her nose, with great pain in the nasal region and frontal sinuses. 



The so-called " peenash," a common malady in Rajputana, is a true nasal myiasis. 



