CHARACTERISTICS OF LARV.T) OF ANOPHKLINA. 123 



been set forth by Christophers and Stephens, and we do not 

 tind specific value in any additional character. 



(1) Antenna. — {(i) Presence or absence of a branched 

 hair on the shaft. This hair is found on the antero-internal 

 aspect. There is in some species a spikelet on the outer side, 

 which is not constant in any species in our list, except possibly 

 Cellia jacolii; {h) number of branches or divisions of the 

 hair between the terminal spines. 



The former is of value in that the larvte in which it is 

 found form a numerically small otuu}) ; the latter maybe used 

 as a supplementary point in final distinction between similar 

 larva3 of different species. For instance, ardensis and 

 natalensis come in some respects near together (Pis. 

 XVIII, XXIII, XXI Y), but in ardensis the hair divides 

 into two, in natalensis into six or eight. The number, 

 however, is not constant. In most specimens of funesta 

 three divisions were observed, but in one half-gi'own larva 

 there Avere four, which is the usual number in costalis. The 

 relative size, one to the other, of the two spines is not, in our 

 experience, of use — in fact, we find them practically equal in 

 all our species, variation being no greater than is found in 

 the two sides of a lobster's claw, which they much resemble. 



James and Liston lay stress on the importance of a branched 

 hair outside and parallel to the antenna, which they call 

 the " basal hair." We do not feel quite sure what they mean 

 by this, because they make no mention of it in description of 

 individual species, except in the case of culicif ormis, while 

 it is figured in plates of jeyporensis, culicifacies, and 

 aitkeni only in addition. We find a similar hair in all 

 species. It arises from a point outside the antenna, and on a 

 slightly lower plane only, and therefore comes into view under 

 the microscope with the antenna, and is shown accordingly in 

 the plates. This is present on the head of paludis, but in 

 all our specimens arises on a much lower plane than the 

 antenna. It is necessary in most instances to focus especially 

 for it ; it cannot conveniently be drawn in relation to the 

 dorsal aspect of the larva, and is omitted on that account 



