568 THE ANIMAL PARASITES OF MAN 



This genus is found in Africa, India, Europe and in Australia. Three species 

 are proved malaria bearers, namely, P. costalis, Loew, P. cJiaudoyei, Theob., and 

 P. superpictus, Grassi. Members of this genus can be told by having narrow 

 curved thoracic scales, hairy abdomen, and much-spotted wings. 



Genus. Myzorhynchella, Theobald. 



"Mono. Culicid.," 1907, iv, p. 78. 



In this genus the thorax has distinct, narrow curved scales, and the abdomen 

 is hairy, the wing scales broad and lanceolate, and the head with broad scales not 

 closely appressed, but not forked or fimbriated. 



Five species are known : //*/,. Cruz ; parua, Chagas ; nigritarsis, Chagas ; 

 tibiomaculata, Neiva ; gilesi, Neiva ; and nigra, Theobald. They are all 

 recorded from Brazil, and nigra also from Mexico. 



Genus. Manguinhosia, Cruz, in Peryassu. 



"Os Culicideos do Brazil," 1908, p. 112. 



A single marked species from the Brazils. The thorax has piliform curved 

 scales, and some narrow curved and flattened ones on the sides. Abdomen pilose, 

 except the last three segments which are scaled. No tufts of scales on posterior 

 femora. 



Allied to Lophoscelomyia, but at once told by the absence of scale tufts on the 

 hind femora. M. lutzi, Cruz, Brazil. 



Genus. Chrystya, Theobald. 



*' Rep. Sleeping Sickness, Roy. Soc. Eng.," 1903, vii, p. 34. 



A very marked genus in which the hairy abdomen has very long, dense, hair-like, 

 apical, scaly tufls to the segments. A single species only so far known, C. implexa, 

 Theobald, from Africa (Uganda, Sudan, etc.). 



Genus. Lophoscelomyia, Theobald. 



Entomologist^ 1904, xxxvi, p. 12. 



A single species only, from the Federated Malay States. The hind femora have 

 dense, apical scale tufts ; the thorax long, hair-like curved scales ; abdomen pilose, 

 except the last two segments which are scaly ; wings with broad, blunt, lanceolate 

 scales. 



Genus. Arribalzagia, Theobald. 



" Mono. Culicid.," 1903, iii, pp. 13 and 81 ; and 1910, v, p. 48. 

 Two species only occur, found in South America. The thorax and abdomen 

 have scales and hairs respectively, as in Pyretophorus, but the abdomen has in 

 addition prominent lateral apical scale tufts to the segments and a scaly venter. 

 Wings with membrane tinged in patches and wing scales bluntly lanceolate and 

 very dense. The type is A. maculipes, Theob. found in Trinidad and Brazil; 

 A . pseudomaculipes, Cruz, also in Brazil. 



Genus. Myzorhynchus, Blanchard ; Rossia, Theobald. 

 Compt. rend. heb. Soc. BioL, 1902, No. 23, p. 795, Blanchard ; Jonrn. Trop. 

 Med., 1902, p. 181, Theobald ; "Mono. Culicid.," 1903, iii, p. 84; 1907, iv, p. 80; 

 1910, v, p. 49. 



A very marked genus of large, dark, densely scaled species, found in Europe, 

 Asia, Africa and Australia. The thorax with hair-like curved scales; the abdomen 



