78 PROCEEDINGS OF THE ACADEMY OF [Jan.^ 



femora is green; apices of all the femora, or only the caudal femora 

 and the adjacent portion of the tibiae blackish; caudal femora proxi- 

 mad with a reticulate pattern of blackish brown on the lateral face, 

 a central line of which pattern is more or less decidedly indicated;, 

 distal portion of the caudal tibiae and tarsi blackish. 



Distribution. — The present species is known only from two localities 

 on the slopes of the upper Rio Balsas Valley in the states of Morelos 

 and Guerrero, Mexico. The species apparently has a range in 

 vertical distribution extending from about 1900 to 5440 feet, from 

 the evidence of the two localities from which it is now known. 



Morphological Notes. — The ovipositor, as is usual in species of the 

 genus, varies somewhat in length. The subgenital plate of the 

 female shows considerable variation in the form of the distal margin, 

 ranging from the truncate type originally described, through the 

 moderately arcuato-emarginate condition found in our Cuernavaca 

 topotype, to the moderately decided and distinct obtuse-angulate 

 emarginate condition found in the Rio Cocula specimen. The- 

 tegmina of the "female have a certain amount of variation in the distal 

 margin of the same, this being more truncate in one of our specimens 

 than in the other. There is also some little variation in the \ndth 

 of the interspace between the tegmina in the same sex. 



Synonymy. — The senior author is responsible for the only synonym 

 of the present species — D. pulchra. The female specimen on which 

 that synonym was based was first recorded correctly by him as 

 D. ?nexicana, but later differences in the subgenital plate were noticed 

 which seemed of specific value, and the individual was separated as 

 D. pulchra, its closest relationship being supposed to be with D. 

 emarginata. The apparent difference on which this separation was 

 made we now know to be untrustworthy, as the amount of com- 

 pression of the plate produces a different form in the margins of the 

 same. A certain amount of individual variation in the emargination 

 of this plate is also evident from the form of it in the three known 

 individuals of that sex. 



Remarks. ^Ow'ing to our lack of male individuals of this species, 

 the type of that sex being unique as far as known, we have placed 

 the species in the male key from the evidence of the original descrip- 

 tion. 



Specimens Examined. — 2; 2 females. 



Cuernavaca, Morelos, Mexico, January 4, 1899, 1 9 . [Hebard 

 Coll.] 



Rio Cocula, Guerrero, Mexico, May 12, 1898, (Otis W. Barrett), 

 1 9 . Type of pulchra. [A. N. S. P.] 



