138 C. STRICKLAND — THE MYZORHYNCHUS GROUP 



(3) umbrosus has sometimes its last abdominal segment clad with scales, and 



it is therefore not improbable that occasionally these take the form of 

 an outstanding tuft ; 



(4) barbirostris has sometimes a series of ventral tufts, a fact indicating 



that the presence or not of such scales is not of much importance 

 phylogenetically ; 



(5) the females only are ever tufted, the males cannot be grouped into 



genera morphologically except by reason of their relationship to the 

 females. 



In short, species which are placed by James and Stanton (1911) into two 

 genera have forms in Malaya which run into one another, and it is impossible to 

 distinguish two distinct groups of them. 



Similarly we have evidence that the genus Lophoscelomyia is the same as 

 Myzorhynchus. Alcock (1911) came to the conclusion that this was so, and re- 

 ferred asiatica to his subgenus Myzorhynchus. Nov? Lophoscelomyia is distinguished 

 from Myzorhynchus by the presence on the femora of the outstanding tuft of scales 

 in the former which is absent in the latter, as well as scales on the dorsum of the 

 last abdominal segment, supposed to be absent in Myzorhynchus. But — 



(1) I have found a barbirostris with tufted femora as in asiatica ; 



(2) I have found specimens of umbrosus and barbirostris with the last 



abdominal segment clad with flat scales, which is one of the main 



points of the genus Lophoscelomyia ; 



(8) the wings of all the species placed in Lophoscelomyia. or Myzorhynchus 



are marked in a strikingly similar manner ; thus the costa has nearly 



always two golden spots or rudimentary spots, one at the junction with 



the subcostal and one at the junction with the first longitudinal vein ; 



the first of these nearly always involves the first longitudinal, while 



the second nearly always involves the upper branch of the second 



longitudinal ; the lower branch of the second longitudinal has also 



nearly always an area of light-coloured scales and the wing-fringe has 



always a golden spot opposite the junction of the third long vein ; and 



(4) Lophoscelomyia has patagial tufts like Myzorhynchus, and its clothing 



of hairs and scales is essentially similiar. 



I conclude therefore with Colonel Alcock that Lophoscelomyia is not distinct 



from Myzorhynchus, and that the five species sinensis, barbirostris, umbrosus, 



albotaeniatus, and asiatica form generically one group. 



I note that Colonel Alcock on the other hand would not divide up the 

 Anophelines into groups at all, but would call them all Anopheles. But the 

 species here discussed form such a well-defined group that I think myself that it 

 would be i defeating the humane objects of a natural classification ' not to knit 

 together under a separate title obviously related forms such as these, and I 

 therefore suggest that the genus Myzorhynchus do stand. 



The Morphology of the Species. 



In the descriptions which follow, the imagines only are concerned, as the 

 morphology of the other stages has not been considered, and the plan adopted 



