A NEW BRITISH MOSQUITO 91 



A NEW BRITISH MOSQUITO. 



By F. W. Edwards. B.A., F.E.S. 



Among a small collection of CuHcidae recently sent for 

 determination by Mr P.' H. Grimshaw were a single male 

 specimen collected at Bonhill, Dumbarton, 21st August 1909, 

 by Mr J. R. Malloch, and three females, from Bonhill, 

 4th May 1907 (Malloch) ; Newington, Edinburgh, September 

 1912 (Annandale) ; and Chambers Street, Edinburgh, 30th 

 September 1909 (Grimshaw) respectively, belonging to the 

 genus Theobaldia, and representing a species new to the 

 British list. 



In the year 1906 {Canadian Entomologist, xxxviii., p. 326) 

 Dr C. S. Ludlow described a species of this genus from 

 Alaska as T. alaskiiensis ; a fuller description of this, also a 

 figure of the male genitalia, is given in Howard, Dyar 

 and Knab's Monograph of the Mosquitoes of Nortli and 

 Central America (vol. iii., p. 498). More recently a single 

 male of a very similar species was re.ceived at the British 

 Museum from Archangel, having been collected there in 

 1918 by Captain A. G. Garment. Owing to the widely 

 different locality and to the fact that the genitalia showed 

 slight differences from Howard, Dyar & Knab's figure, I 

 regarded this as a species distinct from T. alaskdensis, and 

 briefly described it {Bull. Ent. Res., x., p. 136, end of January 

 1920) as T. arctica. Meanwhile Dr Ludlow has also pro- 

 posed the name T. siberiensis {Insccutor Insciticu, vii., p. 151, 

 beginning of January 1920) for a number of females from 

 Eastern Siberia which are almost, if not quite identical, with 

 T. alaskdensis in coloration. 



I am now inclined to regard these names as indicating 

 at most slight local variations of a single species of holarctic 

 distribution. As, however, no males have been received at 

 the British Museum from Alaska or Siberia, it will perhaps 

 be as well to call our species provisionally by the name 

 T, arctica. 



T. arctica resembles T. annulata in having distinctly 

 spotted wings and a median white stripe on the second 

 abdominal tergite. It differs conspicuously, however, in 

 having no white rings near the tips of the femora and tibial, 



