MOSQUITOS OF THE PALAEARCTIC REGION. 319 



specimens with this dark stripe (such as the Japanese examples recorded below) 

 may represent a distinct species or variety {albolateralis, Theo.), but in view of 

 Leicester's remarks on the variability of the species I doubt if this is so. Unfortunately, 

 I did not examine the hypopygium of the Japanese male. A male from the Andaman 

 Islands shows the following characters : — Side-pieces about twice as long as their 

 depth (or three times as long as their width) at the base, tapering, densely scaly 

 on their outer and under sides, finely hairy on the inner side, some long hairs at the 

 base beneath ; a dense row or tuft of very long and broad scales on the upper (sternal) 

 side, not reaching the base. Claspers short, with a very long terminal spine which 

 is quite two-thirds as long as the clasper itself. Lobes of ninth tergite with about 

 four very long bristles. Claspettes with the appendage moderately expanded in 

 the middle, about equalling the stem in length. The male palpi are of practically 

 the same length as the proboscis, the last two joints turned downwards and bearing 

 long hairs. 



li'EicXwwQXdi's, Culex niveus is an Aedes, the name is inehgible for this species, 

 and pseudoniveus should be used mstead, but in view of the uncertainty there 

 is perhaps no necessity to make the change. 



The larvae are not yet described, though Leicester records finding them in cut 

 bamboos. 



Distribution. — A widely-spread Oriental species extending into Japan (Tokio, 

 S. Yamada ; 1 (^ 1 $ in coll. M. Koidzumi). 



30. Aedes (Finlaya) eatoni (Edw). 



Ochlcyotatus eatoni, Edwards, Bull. Ent. Res. vi, p. 358 (1916). 



Apart from the very different thoracic markings, this species differs from A . 

 geniculatus in the coloration of the hind femora, which are black above for their 

 whole length, instead of entirely white on the basal half. The female and larva 

 remain unknown, the description being based on a single male, the palpi of which 

 are only about two-thirds as long as the proboscis. 



Distribution. — Madeira Island {Eaton). 



31. Aedes (Finlaya) geniculatus (Oliv.) (figs, lb, 5 g, 10 a). 



Culex geniculatus, Olivier, Encycl. Meth. Hist. Nat. Ins. vi, p. 134 (1791). 



(?) Culex lateralis, Meigen, Syst. Beschr. i, p. 5 (1818) et auct. 



Culex ornatus, Meigen, Syst. Beschr. 1, p. 5 (1818). 



Culex guttatus, Curtis, Brit. Ent. p. 537 (1834). 



Culex fuscidus, Zetterstedt, Dipt. Scand. ix, p. 3459 (1850). 



Cidex albopnnctatus, Rondani, Bull. Soc. Ent. Ital. iv, p. 31 (1872). 



The shining white, almost silvery knee-spots, and the coloration of the hind 

 femora will distinguish even somewhat rubbed adults of this species from any 

 member of the subgenus Ochlerotatus. Fresh specimens are obviously distinct by 

 their thoracic markings. From the alhed A. echinus this species differs mainly 

 in the narrower scutellar scales ; but even this is not absolutely diagnostic, as I 

 have seen a male from the south of France which is certainly only A. geniculatus, 

 but which has some small flat scales on the scutellum. The larva, however, is very 

 different from that of A. echinus, and as it is the only other species of the genus 

 which is found in tree-holes in Europe, no confusion with any other species is likely. 



As I have previously stated (Ent. Mo. Mag. 1912, p. 277), I do not think there 

 can be any doubt that Olivier's name should apply to this species, and that Theobald 

 was in error in using it for Culex hortensis. I now believe that the female which 

 Meigen originally described as C. ornatus must have been this species, although 

 the male which he described at a later date must have been something else, as 

 he refers to the white marks on the palpi. Van der Wulp, Verrall, Galli-Valerio 

 (4183) z2 



