36 



of June ; New York, from June 23 to July 17 ; Missouri, in May ; 

 Colorado, from the llth to the 16th of June; California, June 1 

 to 18. 



I have seven European species of Platyptilia in my collection, 

 all named by Professor Zeller. Five of these are males, and an 

 examination of the genitalia proves that one which Zeller named 

 bertrami is ochrodactyla and one named oclirodactyla is bertrami. 

 They approach each other so closely in form and coloration that it 

 is not surprising that they should have been considered conspecific 

 for so long a time, and that there should have been so much dis- 

 cussion about the matter in the European journals. Mr. Tutt has 

 given an excellent resume" of this discussion in his ' ' Monograph of 

 the Pterophorina of Britain." Mr. Tutt suggests that Haworth's 

 pallidactyla is identical with bertrami, and in that case it should 

 take precedence, but until this is adopted we must accept the name 

 marginidactyla Fitch, which is ten years older than bertrami. 



The types of Fitch now belong to my collections ; and I have 

 made a critical examination of the genitalia, and they agree per- 

 fectly with the genitalia of bertrami. 



GENUS ALUCITA Linn., Syst. Nat., Ed. X., p. 542 (1758). 



Vertex smooth ; front smooth or a little swollen, closely scaled ; 

 antennae with a thickened basal segment. Palpi slim, porrect or 

 somewhat ascending, the third segment shorter than the second, 

 pointed and sometimes .bent down a little. Anterior and middle 

 tibiae very slightly thickened at the end ; hind tibiae without thick- 

 ening of scales. Abdomen moderately slim, the second and third 

 segments not much longer than the others. Fore wings fissured 

 half their length or a little more, the lobes running to a point and 

 bent backward somewhat, especially the second lobe. Feathers of 

 the hind wings all of the same form, linear and pointed, without a 

 cluster of dark scales in the fringe of the third feather. 



SYNOPSIS OF THE SPECIES. 



Ground color of the fore wings white, . . . ! . . ' . montana. 



Ground color of the fore wings yellowish white, . . cinerascens. 



Ground color of the fore wings gray, ., - * , _,-. . ; .- . . 2. 



Expanse of wings, 18 mm., . * , '...- * ., . >. . belfragei. 



Expanse of wings, 25 mm., . . . . . . walsinghami. 



ALUCITA WALSINGHAMI, n. s. 



Expanse of wings, 25-26 mm. Head, thorax and abdomen 

 grayish white. Legs pale brown. 



