70 insecutor insclti;e menstruus 



Series 1 

 Species 1 



Aedes (Ochlerotatus) dysanor, new species. 



Mesonotum gray at the sides, the dorsal lines brown, gen- 

 erally separate with a tendency toward suffusion, sometimes 

 confluent in a square band ; abdominal bands white, narrowed 

 centrally, moderately broad ; generally as in punctor, appar- 

 ently smaller. A narrow white line on the outer side of hind 

 tibiae. 



Hypopygium. Apical lobe of side-piece as in punctor; basal 

 lobe small, conically elevated, with an oblique basal chitinized 

 rod as in lasarensis (Plate I, fig. 1), but the structure is much 

 smaller, a group of long setse on the basal aspect, of which 

 one is curled at the end, but hardly stouter than the others, 

 although with a larger basal tubercle. Claspette longer and 

 slenderer than in punctor, the filament much longer, sickle- 

 shaped, gradually widened in the middle (Plate I, fig. 3). 



Type, male. No. 24023, U. S. Nat. Mus. ; Pittsburgh, New 

 York, April, 1905 (H. G. Dyar and Miss Edna Hudson) ; para- 

 types, males, six, Dublin, New Hampshire, May, 1909 (A. 

 Busck) ; two, Saxeville, Wisconsin, May 23 and June 1, 1909 

 (B. K. Miller) ; one, Fort Ethan Allen, Vermont (through Dr. 

 C. S. Ludlow) ; one, Fort Strong, Massachusetts, May 5, 1920 

 (R. I. Schott, through Dr. C. S. Ludlow). 



No isolated larvae are at hand ; but the characters must be 

 essentially as in punctor, for several specimens were deter- 

 mined by the late Frederick Knab as auroides Felt, the deter- 

 mination being made from the larvae at the time, collected by 

 Mr. August Busck. 



This is evidently the American representative of the Euro- 

 pean A'cdes concinnus Stephens (= sylvae Theobald, Lang, 

 Handb. Brit. Mosq., 91, 1920, of which dorsovittatns Villeneuve 

 is also a synonym according to F. W. Edwards, in litt.). I 

 have before me no slide of concinnus; but the European form 

 has the filament of the claspette very broad and short, as kindly 



