274 F. W. EDWARDS. 



not forming definite processes. This may perhaps indicate a specific difference from 

 the Indian form, though I cannot find any other characters in the adult to support 

 such a conchision. 



This is possibly the so-called new species recently recorded (but not named) 

 from Japan (see Tropical Diseases Bulletin, xvi, 1920, p. 106). 



Distribution. — Mountains of India; Formosa {Koidznmi) ; Japan (Nagasaki, 

 Lamboni). 



7. Anopheles (Anopheles) punctibasis, sp. n. 



Closely related to A. hyrcanns (Pall.), but differs in the following particulars :— 

 Average size somewhat larger (^4 -5 mm., $5-5 mm. in length of wing); wings 

 more distinctly mottled in naked-eye appearance than in the most brightly-marked 

 A . hyrcanus. Antennae slightly but distinctly more slender than those of A . hyrcanus 

 except for the first joint, which is distinctly stouter. Scales of antennae light brown 

 and confined to the torus and the first two flagellar joints (in A. hyrcanus they are 

 white and extend to the fourth or fifth flagellar joints). Palpi normally entirely 

 black-scaled. All the tibiae, the first three joints of the front and middle tarsi, and 

 the first four joints of the hind tarsi, narrowly but distinctly whitish-ochreous at the 

 base as well as at the tip. A white dot at the extreme base of the costa, and a second 

 immediately bej^ond the humeral cross- vein. Dark and light areas on veins sharply 

 defined, no intermixture of light and dark scales except to a very slight extent on 

 the third vein. Processes of ninth tergite of male hypopygium very short and broad, 

 almost semicircular in form (hypopygium otherwise much like that of A. hyrcanus). 



Distribution. — Japan : Nagasaki, 8-1 9. v. 1921, 2 o (including type), 5 $ reared 

 from pupae found in a muddy shaded pool in company with Culex hayashi ; 

 Yokohama, vi.l921, 1 $ reared from larva [Dr. W. A. Lamborn). 



The sum of the characters enumerated above seems to be quite sufficient to 

 distinguish this form specifically from A. hyrcanus, though the close relationship 

 is evident. The black-scaled palpi at first sight afford an easy means of distinction, 

 but the Yokohama specimen has narrow white rings at the articulations and a distinct 

 white tip to the last joint. 



8. Anopheles (Anopheles) hyrcanus, Pallas (fig. 2, f). 



Culex hyrcanus, Pallas, Reise durch versch. Prov. d. Russ. Reichs. i, p. 475 (1771). 

 Anopheles sinensis, Wiedemann, Aussereurop. zweifl. Ins. i, p. 547 (1828). 

 Anopheles picttis, Loew, Dipt. Beitr. i, p. 4 (1845). 



Anopheles pseudopictus, Grassi, Atti R. Ace. Lincei, Rendic. viii, 1, p. 102 (1899). 

 Anopheles sinensis var. mesopotamiac, Christophers, Ind. J. Med. Res. iii, p. 196 

 (1916). 



Easily distinguished from all other species in the Palaearctic fauna, except 

 A. punctibasis and A. niauritianus, by the distinctly swollen front femora. This 

 character was pointed out by Loew in his description of A . pictus, and together with 

 the shaggily-scaled female palpi forms the best distinguishing mark of the Myzorhynchns 

 group, the character of the venti^al scale-tuft, on which the group was originally 

 founded, being quite unreliable. The relation with the Anopheles group (in the strict 

 sense) is however, obviously close ; there is no definable difference in the larvae 

 or hypopygia, and the colour differences are bridged by such species as A. gigas. 

 I therefore do not admit Myzorhynchns as a distinct subgenus. 



A. hyrcanus is a variable species in many respects, and shows a strong tendency 

 to the production of local races. In the Oriental region some of these may be said 

 to have reached specific differentiation {e.g., A. separatus, Leic), but this can hardly 

 be said of the Palaearctic forms, at least with our present knowledge of them. 



