330 THE canaWan entomologist. 



< Bla 



(No 



3{ 



I desire to thank Mr. A. D. MacGillivray, for kindly acquainting me 

 witli Mr. Eaton's classification of the British species. 



The species may be tabulated as follows : — 



( Wings grayish 2 



i Wings blackish 4 



Black dots at tips of some veins alternat'a. 



dots*. 3 



At least two millimeters long cinerea. 



Less than two millimeters mimita. 



( Black dots at tips of some veins.... superba. 



1 No black dots, wings without white hair except in fringe 5 



/ Two distinct median patches of erect black hair, thorax black, fringe 



5 around apex whitish marginalis. 



\ Wings evenly black, fringe not whitish 6. 



, ( Thorax white and with white hair bicolor. 



o 

 I Thorax black and with black hair nigra. 



Psycho da alteniata, Say. 



Body nearly white or slightly yellowish, with white and grayish hair ; 

 wings thinly clothed with gray hair, indistinctly showing a pale band at 

 middle and one near base ; spots of black hair at tips of veins 6, 8, and 

 10, and usually at ends of 2, 3, and 4 ; the fringe of gray hair which on 

 posterior margin is three times as long as the width of a cell. Legs pale 

 with white hairs. Antennje slender and short, not as long as breadth of 

 wing, quite thickly clothed with whorls of white hair ; wings moderately 

 narrow, acute at tip. The $ genitalia consist of two pairs of appendages; 

 the inferior pair very slender, and as long as the diameter of the tip of 

 the body, approximate at base, gradually separating and then strongly 

 curving toward each other near tip, clothed beneath with long white hair ; 

 the superior pair quite wide apart at base, about half as long and less 

 slender than the inferior pair, but little curved and with only short hair. 

 The ventral plate of the $ is yellow, nearly twice as long as broad, with 

 an emargination behind as deep as the plate is broad, the rounded 

 branches slightly diverging ; the ovipositor scarcely twice as long as the 

 plate, slender and a little curved. Length of wing, 2. to 2.2 mm. 



Common in July, on windows and on shrubbery near buildings ; Sea 

 Cliff, N. Y. 



