M YZORH YNCH US 



795 



(a) Apical one broad ; others narrow : — 



(1) Fringe-spots narrow — costalis Loew. 



(2) Fringe-spots broad — merus Donitz. 



(b) Apical and median ones broad — marshalli Theobald. 

 {b) No spots on femora — pseudocostalis Theobald. 



(c) Femora, tibiae, and first tarsals spotted. Tarsal bands apical. 

 Four palpal bands — -ardensis Theobald. 



Myzorhynchus Blanchard, 1902. 



These mosquitoes are usually said to only qccur in the open, but we have 

 repeatedly found Myzorhynchus barbirostris in houses. M. sinensis is known 

 to carry the parasite of malaria in Japan. No species have so far been 

 reported from America. 



The thirteen species can be recognized as follows (it has been asserted that 

 Anopheles coustani, which has never been correctly placed, is M. coustani 

 Laveran, but see Chapter XXXV. on this point) :- — 



Myzorhynchus. 



A. Palpi unhanded: — 



I. Last hind tarsals brown. Legs with pale apical tarsal bands: — 

 {a) One fringe-spot. 



(1) Legs not spotted — barbirostris van der Wulp. 



(2) Legs with speckled femora and tibiae, and more numerous 



' round-ended ' scales on the wing— pseudobarbirostris 

 Ludlow. 



(6) Several fringe-spots — bancrofti Giles. 

 (c) No fringe-spot. 



(i) One pale costal spot; wings with light and dark scales — 



umbrosus Theobald. 

 (2} Two pale costal spots ; wings mostly dark scaled — strachani 

 Theobald. 



II. Last hind tarsal white — albotcsniatus Theobald. 



B. Palpi banded: — 



I. Last hind tarsal brown: — 



[a] Wing-fringe with one pale spot — sinensis Wiedemann. 



[b) Wing-fringe unspotted. 



(a) Palpi with four pale bands; apex white. 



1. Wings with two yellow costal spots. 



(1) Wings distinctly spotted — vanus Walker. 



(2) Wings without prominent spots — pseudopictus 



Grassi. 



2. Wings with two white costal spots — niinuHis Theobald. 



(b) Apex of palpi black — nigerrimus Giles. 



II. Last two hind tarsals white — mauritianus Grandpre. 



III. Last three hind tarsals white — paludis Theobald. 



Nyssorhynchus Blanchard, 1902. 

 The important member is Nyssorhynchus fuliginosus Giles, 1900, which is 

 without doubt a malarial carrier. Theobald's diagnostic table is as follows : — 



Nyssorhynchus. 



A. Last hind tarsals brown: — 

 Legs spotted : — 



[a) Apical pale bands to legs. 



(1) Proboscis dark — stephensi Liston. 



(2) Proboscis pale on apical half — masteri Skuse. 

 (6) Apical and basal pale banding — annulipes Walker. 



