THE CANADIAN ENTOMOLOGIST. 177 



THE NORTH AMERICAN SPECIES OF ORPHULELLA. 



1>,Y SAMUEL H. SCUDDER, CAMBRIDGE, MASS. 



By the kindness of Prof. L. Btuner I have recently been able to 

 study specimens of the South American OrpJiula pagana Stal., the 

 type of the genus, and so to compare its structure with that of our native 

 species latterly referred to Orphula. By this it appears, as Mr. Bruner 

 has pointed out to me in correspondence, and as Mr. A. P. Morse has 

 suggested {Psyche^ VII., 407), that our species should be referred rather 

 to Orphulelk, separated by Giglio-Tos from Orphula in 1894, though this 

 was afterwards regarded by him as having only a subgeneric value. 

 Orphula in the stricter sense of the term is not, so far as I know, 

 represented in the United States. Orphulella is the most widely dis- 

 tributed genus of North American Tryxalinae and the most abundant in 

 species. Those known to Prof. J. McNeill in his recent revision of our 

 Tryxalinse were well separated by a table which I have here made the 

 basis of a new one to include a considerable number of new forms. 

 Besides describing these, I have added notes of distribution of the 

 others, based on the collections in my hands, and given their principal 

 synonymy. 



Table of the North American species of OrpJiulella. 

 A\ Discoidal area of basal half of female tegmina generally plainly 

 narrowed distally, where it is nearly always occupied by a single row of 

 cells and is plainly narrower than the ulnar area at its widest part ; 

 ulnar area of male occupied by a single row of cells, rarely (tepaneca*) 

 partially divided into two sets by an irregular spurious vein. 



b\ Lateral carinae of pronotum parallel or very faintly arcuate on the 

 prozona. 



c\ Male antennas no longer than head and pronotum together, 

 basally depressed and apically acuminate or subacuminate. 



d\ Pronotum less obtusely angulate ; prozona and metazona 

 subequal in length ; tegmina generally not surpassing the hind 

 femora, the discoidal area in both sexes with a spurious vein 

 running through the middle, dividing it into two sets of cells ; 

 ulnar area with a similar ( $ ) or interrupted {^) spurious vein, 

 making a similar division tepaneca. 



*It is a little difficult to say into which division tepaneca should fall, as it is 

 somewhat variable ; by the male it falls best here ; by the female under A", 



