308 F. W. EDWARDS. 



Mik ; Jaszenova, Ujhelyi ; Kovakspatak, Kerfesz ; Budapest, Csiki, males ; 

 Neusiedler See, Mik, and Munkacs, Ujhelyi, dark females) ; Ural (Winthem, light 

 female) ; Siberia (Nasimovo, 59° 35', males and dark females ; Nikulina, 60° 25', lighter 

 male, Trybom ; Omsk, Grand, light females) ; Kamtchatka {Bolsherjetsk, 20.vii.l7, 

 y. Wuorentaus, light female) ; Asia Minor (Seraj-Koj, Naday, dark females). 



12. Aedes (Ochlerotatus) rusticus (Rossi). 



Culex rusticus, Rossi, Fauna Etrusca, ii, p. 333 (1790). 



P Culex niusicus, Leach, Zool. Journ. ii, p. 293 (1825). 



Culex pungens, Robineau-Desvoidy, Mem. Soc. Hist. Nat. Paris, iii, p. 407 (1827). 



Culex quadratimaculatus, Macquart, Suites a Buffon, i, p. 34 (1834). 



Ctdex diver sus, Theobald, Mon. Cul. ii, p. 73 (1901). 



Culex nemorosus var. hdeoviUatus, Theobald, Mon. Cul. ii, p. 85 (1901). 



This is the largest species of the dark-footed group of the subgenus, and is very 

 distinct from all the rest in the structure of the hypopygium and larva. The male 

 has the palpi stouter than in most species ; it can generally be distinguished even 

 by the naked eye on account of the dense golden-yellow hairs which arch over the 

 hypopygium, hiding the claspettes. The most strongly-marked form of the female, 

 on which I have presumed Rossi's and Robineau-Desvoidy's original descriptions 

 were based, shows a yellowish longitudinal stripe running the whole length of the 

 abdomen, and dividing the black scales into two squarish areas on each segment ; 

 but it is commoner to find this longitudinal stripe distinguishable only on the last 

 two or three segments, and such specimens will sometimes have to be examined 

 carefully to avoid confusion with other species, such as 0. pimctor and 0. communis. 

 The pro-epimeral scales will separate it immediately from all other Palaearctic 

 species. 



An interesting variation is shown in a female from Szeged (Kertesz), which has the 

 abdomen almost entirely covered with yellowish scales, the black ones occurring only 

 towards the middle of some of the segments without forming definite markings ; 

 the mesonotal scales are also much paler than usual, especially towards the sides. 

 The pro-epimeral scales are normal for the species. A similar specimen from Budapest 

 has been described by Theobald (Mon. Cul. iv, p. 344) as Culex lutescens, but, as 

 stated above, I prefer to use Fabricius' name in another sense. 



Walker (List Dipt. Brit. Mus. i, p. 8) queries C. musicus as the same as 

 C. quadratimacidatus. The synonymy indicated may be correct, but the specimens 

 are no longer in existence. 



The larva is one of the few in this genus which lives through the winter, though 

 jierhaps many of the eggs do not hatch until the early spring. There is some 

 individual variation in the number of hairs on the antero-dorsal side of the siphon. 



Distribution. — West, central and south Europe. Locally common in England, 

 France, Belgium, Germany and Denmark. Also Italy {Rossi ; Taranto, Har greaves ; 

 Livorno, Mann) ; Macedonia (Waterston). Not yet recorded from Sweden, Finland, 

 Russia or Asia. 



13. Aedes (Ochlerotatus) lepidonotus, Edw. (figs. 5 b, 5 f , 8e.) 

 Ochlerotatus lepidonotus, Edwards, Bull. Ent. Res. x, p. 132 (1920). 

 Distinguished by the characters given in the keys and by the uniformly pale- 

 scaled abdomen of the female. The larva is unknown. 



Distrilmtion. — Macedonia {Waterston) . 



14. Aedes (Ochlerotatus) albescens, sp. n. 



Apparently related to A. lepidonotus, Edw., but the postnotum bears no scales. 

 Almost all the scales of the body whitish, except on the proboscis and palpi, where 

 they are mostly brown. Pro-epimeral scales whitish, rather narrow, some of them 



