316 F. W. EDWARDS. 



a new species, A . palmeni, on account of some differences which I thought I perceived 

 in the male hypopygium in two specimens from Finland. On a re-examination I 

 failed to verify these differences, but meanwhile, vmfortunately, I had published the 

 name palmeni in my key to the Swedish species. 



Distribution. — Europe, except west and south, and probably across Siberia to 

 Alaska and Canada. I have examined male specimens from Denmark {Wesenberg- 

 Lund) ; Sweden (Dalecarlia, Vesterbotten, Norrbotten, Boheman) ; Finland 

 (Helsingfors, /. Sahlberg ; Seitjaur, Palmen) ; France, Foret de Maries, Alluaud) ; 

 Germany (Berlin, Lichtivardt) ; Austria (Admont, Steiermark, Strobl ; Richenau 

 and Linz, Mik ; Dornbach, Handlirsch). 



I have also seen females, probably of this species, from Lappland and Siberia 

 (Yeniseisk) . 



24. Aedes (Ochlerotatus) puilatus (Coq.) var. jugorum (Villen.) (fig. 7 i). 



Culex puilatus, Coquillett, Proc. Ent. Soc. Wash, vi, p. 168 (1904). 



Culex jugorum, Villeneuve, Bull. Soc. Ent. France, p. 58 (1919) ; Seguy, Bull. 



Soc. Ent. France, p. 39, figs. (1921). 

 Aedes metalepticus, Dyar, Insecutor Inscitiae, viii, p. 51 (1920). 

 Aedes gallii. Martini, Ober Stechmiicken, p. 110 (1920). 



This closely resembles A. communis, and it is almost impossible to distinguish 

 the two satisfactorily, apart from the male hypopygium and the larva, which are 

 very distinct. A. puilatus is somewhat smaller than A. communis, the integument 

 is perhaps darker, and there are more numerous white scales on the mesonotum. 



I have not seen the types, but an Italian male of A. metalepticus sent by Prof. 

 Bezzi is practically identical in structure with an American male of A. puilatus in 

 the British Museum ; the distinctions given by Dyar must be due either to individual 

 variation or to differences of mounting. The only differences observable in the Italian 

 specimen were that the stem of the claspette was slightly stouter, slightly more 

 angulated, and with a more distinct bristle arising from the angle ; the main spine 

 of the basal lobe was somewhat stouter, and the pale scales of the thorax whiter. 

 These differences taken together may possibly indicate a varietal distinction. 



Dyar suggested that C. jugorum might be the same as A . metalepticus, and this 

 is almost certainly the case, but Seguy's figure of the hypopygium of a specimen 

 (not the type) of C. jugorum shows a distinct apical hair-tuft on the side-piece, as 

 in A. intrudens. The Verestorony examples that I have examined have an aggrega- 

 tion of hairs in this position, almost suggesting a tuft, and S6guy may have exaggerated 

 the appearance of a tuft in his specimen, or the species may be somewhat variable. 

 Both Seguy's and Kertesz's specimens agree with Bezzi's except in this one point. 

 As remarked by Villeneuve, there are long dense hairs arching over the upper (sternal) 

 surface of the hypopygium, as in A. rusticus, A. cataphylla, and some others. 



Distribution. — As yet imperfectly known ; occurs in mountainous regions of 

 Europe and North America, and therefore probably also of Central Asia. Recorded 

 by Martini from Switzerland [Galli-Valerio), by Dyar from north Italy {Bezzi), and 

 by Villeneuve from the Pyrenees (Brolemann). I have seen males from north Italy 

 (Seals, Bezzi) ; Transylvania (Verestorony, Kertesz) ; and the Balkans (Vermosa, 

 1200m., Greuze, Penther) ; also females, possibly of this species, from north Sweden 

 (Kiruna, Lichtwardt). 



25. Aedes (Ochlerotatus) intrudens, Dyar (fig. 8f). 



Aedes impiger, Howard, Dyar and Knab {nee Walker), Monogr. iv, p. 755 (1917). 

 Aedes intrudens, Dyar, Insecutor Inscitiae, vii, p. 23 (1919). 



I know of no satisfactory means of distinguishing the adults of this species from 

 those of A. puilatus or A. communis, but the hypopygium is quite distinct, owing 



