MOSQUITOS OF THE PALAEARCTIC REGION. 311 



Prof. 0. Collet) ; Finland (Jamsa, Bergroth ; Helsingfors ; Hattula, L. v. Essen ; 

 Finnstrom, Frey ; Sund, For sins ; Karislojo, /. Sahlberg ; Kuusamo, Frcy) ; 

 Germany (Frankfurt-Oder, Riedel ; Berlin, Oldenberg) ; Austria (Prater, Mann : 

 this specimen was insufficiently examined and may have been A. salinellus) ; Siberia 

 (Yeniseisk, 58° 20', Trybom). 



18. Aedes (Ochlerotatus) salinellus, Edw. (fig. 7 k). 



Aedes salinellus, Edwards (?) in Wesenberg-Lund, K. Danskc Vid. Selsk. Skr. 



Nat. Math. Afd. vii, p. 197 (1921). 

 Ochlerotatus salinelkts, Edwards, Ent. Tidskr. p. 52 (1921). 

 Aedes terriei. Martini {nee Theo.), Ober Stechmucken, p. 112 (1920). 



The distinguishing points of this species have been mentioned under A. cataphylla. 

 In spite of their close similarity, there can be little doubt that the two species are 

 distinct. I am not satisfied that any older name can be applied to this species. The 

 type of C. terriei is certainly nothing but a normal, if rather small, female of 

 A. detritus, which is common in the locality where C. terriei was taken. It is quite 

 possible that A. salinellus may eventually be found to be the same as some known 

 American species, but at present I have not been able to identify it with any such ; 

 it may be the European representative of A. impiger {=decticns, H.D.K.), which 

 has the male palpi all black and fewer bristles on the ninth tergite. 



The name salinellus was suggested partly because of the strong resemblance to 

 A. detritus {salinus), and partly because the first specimens sent me by Dr. Wesenberg- 

 Lund were reared from brackish water. 



Distribution. — Northern and central Europe. I have seen males from England 

 (Nottinghamshire, Carr) ; Denmark {Wesenberg-Lund) ; Germany (Berlin, Oldenberg, 

 Lichtimrdt ; Kiel, Wiedemann) ; Austria (Vienna, Pokorny) ; Hungary (Budapest, 

 Kertesz ; Bethlen, Ujhelyi ; Postyen, Lichtwardt) . Also some small females, 

 probably of this species, from south Russia (Waloniki, V elitschkovsky) . Martini records 

 it from various places in north Germany, generally near the sea, sometimes in 

 company with A. detritus. 



19. Aedes (Ochlerotatus) diantaeus, H.D.K. 



Aedes diantaeus, Howard, Dyar and Knab, Mosq. N. & C. Amer. iv, p. 758 (1917). 

 Aedes serus. Martini, tjber Stechmucken, p. 96 (1920). 



An extremely distinct species in larva and male hypopygium ; less well defined 

 in the female, but recognisable by the deep bluish-black colour of the tibiae and tarsi, 

 and the broad black stripe down the middle of the mesonotum. Owing to the 

 colour of the legs, and the usually interrupted pale bands of the abdomen, the female 

 might easily be mistaken for A. geniculatus, which of course differs in the structure 

 of the tip of the abdomen, as well as in thoracic markings. I have compared adults 

 and larvae -of European and North American specimens, and can find no difference, 

 except in the length of the anal gills of the larva, which is known to be a variable 

 character. Neither of the published figures of the hypopygium is very accurate ; 

 in particular it should be noted that Martini's omits altogether the conspicuous 

 hair-tuft of the side-piece. 



Distribution. — I have examined the following European material : — Finland 

 (Kuusto, Kuusamo and Kiiminki, R. Frey); Denmavk {Wesenberg-Lund). Martini's 

 material presumably came from the Hamburg district. 



20. Aedes (Ochlerotatus) sticticus (Meigen). 



{l)Culex lateralis, Meigen, Syst. Beschr. i, p. 5 (1818). 

 Cidex sticticus, Meigen, Syst. Beschr. vii, p. 1 (1838). 



