92 THE SCOTTISH NATURALIST 



and none in the middle of the first tarsal joints. There are 

 distinct white rings at the bases of the first three or four 

 tarsal joints, but the legs as a whole have, even to the naked 

 eye, a much less banded appearance than those of T. minulata. 

 There are also important differences between the genitalia of 

 the two species, the male of T. arctica having on the eighth 

 abdominal sternite a row of short spines which are not found 

 in T. annulata, though they occur in some other species of 

 the genus, and are indicated in our British T. {Cnlicella) 

 morsitans. The Scotch male example agrees absolutely with 

 the type from Archangel. 



This very interesting addition to our British faunal list 

 was quite unexpected, but there are several other continental 

 forms which are very likely to occur in Scotland, though they 

 have not yet been recorded from our islands. There are 

 almost certainly further discoveries in store for Scottish 

 dipterists who will undertake to collect mosquitoes, and it is 

 much to be hoped they will do so this season. Apart from 

 the likelihood of the discovery of new British forms, it should 

 be noted that both TJieobaldia arctica and Culex apicalis are 

 at present known as British by four and two specimens 

 respectively taken in Scotland. The second (hitherto un- 

 recorded) specimen of C. apicalis is from Kincraig, 31st 

 May 1908 (Grimshaw). Another very little known species 

 is OcJilerotatJis concinnus (Stephens), which was originally 

 described from Scotland, but has only once been taken since 

 Stephens' time. The male is still unknown ; its discovery 

 will very likely prove that 0. concinnns is the same as 

 O. sylvcB (Theobald) from the New Forest, and O. dorso- 

 vittatus (Villeneuve) from France. 



There are also several gaps to be filled in our knowledge 

 of the life-histories of the insects, the early stages of T. arctica 

 and O. concinnus being entirely unknown. As breeding is 

 the easiest way to obtain good specimens, it is to be hoped 

 that Scottish collectors will undertake it. The larvas should 

 be isolated in i-inch tubes, their skins carefully preserved in 

 spirit or mounted on slides, and labelled to correspond with 

 the adults issuing from them. 



The present writer will be glad to assist any who may 

 have difficulty in determining their captures. 



