Genus Myzorhynchus. 81 



and several are probably connected with malaria. Malarial 

 parasites can develop in them, and it is probable that malaria 

 contracted in the open is accountable to them. M. sinensis 

 (jesoensis) has been shown by Tsuzuki to carry the malarial 

 parasites in Japan. So far none seem to occur in houses. 



One species (nigerrimus) has been found an efficient host for 

 Filar ia bancroftii. All the larvae have much branched, almost 

 brush-like frontal hairs. 



Nothing further of note has been added to their life-history. 



The genus is found in Asia, Africa, Australia, and Europe. 



The known species number sixteen : — 



1. Myzorhynchus barbirostris, Van der Wulp, Leyd. Mus. Notes 6, p. 48 



(India, West Africa ?). 



2. M. bancroftii, Giles, Handbk. Gnats (2nd ed.), p. 511 (1902) (Queens- 



land). 



3. M. umbrosus, Theobald, Mono. Culicid. Vol. III., p. 87(1903) (Malaya). 



4. M. albotaeniatus, Theobald, idem, Vol. III., p. 88 (1903) (Straits 



Settlements). 



5. M. sinensis, Wiedemann, Ausseuro. Zwein. Ins. p. 547 (1828) (China, 



Formosa). 



6. M. vanus, Walker, Journ. Pro. Linn. Soc. Vol. V., p. 91 (1860) (Malaya, 



China). 



7. M. pseudopictus, Grassi. Eend. dell. R. Accad. d. Lincei, p. 128 



(1899) (Italy). 



8. M. minutus, Theobald, Mono. Culicid. Vol. III., p. 91 (1903) (India, 



Punjaub). 



9. M. nigerrimus, Giles, Hand-Book of Gnats, p. 161 (1900) (India). 



10. M. mauritianus, Grandpre and Charmoy, Les Moustiques. Planters 



Gaz. Press (1900) (Mauritius, Central and Northern Africa). 



11. M. plumiger, Donitz, Ins. Borse. Jan. (1901) (Hong Kong, East India). 



12. M.paludis, Theobald, Report. Mai. Com. Roy. Soc. p. 75 (1900) (West, 



Central and Northern Africa). 



13. M. pseudobarbirostris, Ludlow, Journ. New York. Ent. Soc. (Sept. 



1902) (Philippine Islands). 



14. M. coustani, Laveran Arch. d. Parasit. Vol. VI., p. 309 (1902) 



(Madagascar). 



15. M. strachanii. n. sp. (Sierra Leone). 



16. M. ziemani. von Grunberg, Zoolog. Anz. XXV., p. 677 (1902) 



(Cameroons). 



The species of Myzorhynchus tabulate as follows : 



A. Palpi unhanded. 



a. Last hind tarsals brown. 



Legs with pale apical tarsal bands. 

 £. One fringe spot. 



Legs not spotted barbirostris. Van der 



Wulp. 



VOL. IV. G 



