A REVISION OF THE GENUS LEPTOCONCPS, SKUSE. 5 



three patients, two of whom were infected with Plasiiiodiitrn falciparum and one with 

 Plasmodium falciparum and Plasmodium vivax. No infection of these midges occurred 

 although females of Anopheles maculipennis fed at the same time and on the same 

 patients became infected from two of the three cases. Grassi concluded that 

 Leptoconops (Centroiypus) was not able to transmit human malaria. 



In 1913 Sambon extended the possible carriers of pellagra to include, besides the 

 SiMULiiDAE, certain blood-sucking midges ; he particularly referred to Leptoconops 

 in this connection, basing his chief reason for so doing on Chalmers's observations (see 

 above) made in pellagra districts in Lower Egypt. 



Chatton and Blanc (1917) in a paper on Toxoplasma and toxoplasmosis of the 

 gundi {Ctenodactylus gundi) discuss the natural ectoparasites of this animal ; among 

 these they make specific mention of two biting flies, namely L. kerteszi, Kieff. 

 {Mycterolypus laurae, Weiss), and Simiilium maculatmn, Mg. {lineatum, Fries). 



Systematic Account. 



Genus Leptoconops, Skuse (sens. laL). 



Leptoconops, Skuse, Proc. Linn. Soc. N.S.W. (2) iv, p. 288 (1890). 



Tersesthes, Twns., Psyche, vi, p. 369 (1893). 



Centrotvpus, Grassi (nomen nudum), "Die Malaria: Studien eines Zoologen," Jena, 

 p. 118 (1901). 



Mycterotvpus, Noe, Atti Accad. Lincei, Ser. S, Rendiconti, xiv, p. 114 (1905) ; 

 Arch' Zool. Napoh, iii, p. 101 (1907). 



Mycteromvia , Lutz {nee Phil.), Mem. Inst. Osw. Cruz, iv, p. 24 (1912) ; ibid, v, 

 'p. 69(1913). 



Holoconops, Kieff., Ann. Mus. Nat. Hung., xvi, p. 135 (1918). 



Schizoconops, Kieff., Ann. Mus. Nat. Hung., xvi, p. 135 (1918). 



The external morphology of the adults of this genus has been discussed in detail by 

 Townsend (1893), Noe (1905 and 1907), and Langeron (1913) in relation to the species 

 described by them. Owing probably to lack of material, however, no general account 

 based on the examination of a number of species has yet been given, and it is there- 

 fore thought advisable — especially in view of the discrepancies which have appeared— 

 to include here a description of the more important structures. 



Fig. 1. Head of : (a) Acanthocotwps spinosifrons. sp. u., §; {b) Leptoconops kerteszi v&r. 

 americanus, n. ( X 90 circa). 



