MOSQUITOS OF THE PALAEARCTIC REGION. 



301 



The thoracic scahng (brown to dark brown central stripe on front part of mesonotum 

 only, with a broad creamy stripe on each side of it, dark brown again on the shoulders), 

 wing scaling (preponderance of dark scales on the first, third and fifth veins, and of 

 pale scales elsewhere), and the prominent basal lobes of the side-pieces of the male 

 hypopygium will render the identification of nearly every good specimen certain. 



I have decided to adopt the name dorsalis for this species for two reasons. First, 

 I am indebted to M. Seguy for sending me a female from Meigen's collection labelled 

 " Culex dorsalis. Berlin," probably in Meigen's own handwriting. As C. dorsalis 

 was originally described from Berlin, it seems reasonable to accept this specimen as 

 the actual type of the species. It is in good condition, and obviously A. curriei, 

 not A. caspius. Secondly, from the descriptions of Staeger and Zetterstedt, as 

 well as from some examples named by Staeger which were sent me by Dr. Wesenberg- 

 Lund, it would seem that these writers based their conception of C. dorsalis mainly 

 on A. curriei. 



Fig. 8. Hypopygia of Palaearctic species of Aedes : a, outline of side-piece, to show structure 



of basal lobe, of A. caspius (Pall.) ; b, the same, A. dorsalis (Mg.) ; c, the same, A. mariae (Serg.) ; 



d, hypopygium of A. freyi, sp. n. ; e, hypopygium of A. lepidonotus, Edw., ventral view, claspette 



shown also in side view ; f, the same, A. parvulus, sp. n. ; g, A. intfudcns, Dyar. 



Rather contrary to expectation, Macquart's C. maculiventris proves to be this 

 species and not A. caspius, according to the type female, which was sent me by 

 M. Seguy. 



The larva is at present only known from the description of Howard, Dyar and 

 Knab ; it has not yet been isolated in European collections. Specimens sent me by 

 Dr. Dyar agree with the description in the monograph, and differ from A. caspius 

 in at least three points : the siphon is distinctly more slender (index about 2 • 75 

 instead of about 2-3) ; the hair-tuft is scarcely beyond the middle of the siphon ; 



(4183) Y 



