244 l.t.-Col. A. Alcock on the 



Tlie subgenus Arrihulzngia is also essentially similar to 

 Myzorhynchus, and shades into Anopheles through Anopheles 

 (yrah/iamii, Theobald, an 1 Anopheles vestitipennis, Dyar and 

 Knab. 



Tlie two series which constitute the subgenus Myzomyia 

 show the transition from such forms as Anopheles ffi;/cis, 

 Giles, and Anopheles wellcomei, Theobald, to liyssorhytichus. 

 The species known as " Pyretophorus " coslalis is about as 

 nearly intermediate between Myzomyia and Nyssorhynchus, 

 in all res])ects, as can be imagined; and the significance of 

 its position is enhanced by tlie fact that it is a variable 

 species, some individuals leaning more towards Myzomyia^ 

 and others more towards Nyssorhynchus. 



All these considerations justify the conclusion that the 

 so-called "genera" of the proposed "subfamily" Anophelinse 

 cannot be separately focussed as distinct generic conceptions, 

 but must all be merged in one generalization. 



a. Subgenus Anopheles, Meigen. 



(Including Anopheles and Stethomyia and CycJoIepidopteron grabhn»iii of 

 Theobald's Monograph, and Neostethopheles and Patagiamyia of James.) 



There may be some narrow scales on the pronotum and 

 front of the scutum (or even, in one species, in the fiekl of 

 the scutum), but the vestiture of the scutum consists mainly 

 of hairs, which are sparse. I'here may, very rarely indeed, 

 be a few narrow and inconspicuous scales on the genital 

 lobes, but the vestiture of the abdomen also consists of sparse 

 hairs. The wings are either unspotted or have a few dark 

 spots formed by clumps of scales, or they may have a few 

 colour spots, in which case not more than two of these — 

 distinctly formed — are present on the anterior costal edge. 

 The wiiig-scalos are usually, but not always, long and narrow. 

 Tlie palpi are usually slender. 



The subgenus is represented in all the great zoogeogra- 

 phical regions, though it only just enters the Ethiopian 

 region. 



h. Subgenus Myzokhyxchus, Blancbard. 

 (Including Mi/zorhynchus and Lojihosceloviyia of Theobald's Monograph.) 



There are no true scales in the Held of the scutum, though 

 there may be some on its front edge and on the pronotum. 

 Abdominal scales are restricted to a single outstanding tuft 

 on the ventral surface of the penultimate segment, except in 



