124 PROCEEDINGS OF THE ACADEMY OF [Jan., 



The material from San Diego taken April 30 is all nymphal, while 

 at Carrizo Springs nymphs were taken in May and adults only in 

 June. At Wades and Cotulla adults were taken May 21 and 12, 

 respectively, while at Lyford, August 6-7, but a few nymphs were 

 secured, although the adults were numerous. At Hebbronville the 

 species was pairing August 29. 



Morphological Notes. — In the male there is some variation in the 

 relative size of the tegmina and some slight differences in the character 

 of the margin of the median lobe of the cerci, but the variation in the 

 genitalia of that sex, including the distal margin of the subgenital 

 plate, is extremely slight. The really noteworthy feature in the 

 form variation is that of the ovipositor, as it varies some in form as 

 well as dimensions. The even curve of the latter is appreciably 

 flattened mesad in certain individuals. This latter condition, how- 

 ever, is never decided enough to cause the ventral margin to appear 

 wholly or in part straight. The caudal margin of the disk of the 

 pronotum varies in the female from truncate to slightly but dis- 

 tinctly arcuate. 



Synonymy. — The misidentifications of this species, first as D. 

 emarginata by Rehn in 1901, and second by Hunter, Pratt and 

 Mitchell in 1912 as D. emarginata and in part as hrevihastata, we are 

 able to correct, having the material before us. The first error can 

 be explained by the absence of any material for comparison of the 

 closely allied emarginata, while the same reason was doubtless respon- 

 sible for its determination as hrevihastata, only female individuals 

 having been at hand, aside from an alcoholic male from Hebbronville. 



Remarks. — There exists a possibility that the acquisition of more 

 material from the western part, of the range of the species may make 

 desirable the separation of a western race based on the more elongate 

 ovipositor, but our present representation is too limited to convince 

 us of the desirability of that action. This form is complemental to 

 D. emarginata, living in the main in a different region although in 

 much the same situations. 



Specimens Examined. — 65; 29 males, 29 females, 3 male nymphs, 

 4 female nymphs. 



Lyford, Cameron Co., Texas, August 6-7, 1912, (R. and H.), 

 24 cf , 21 9,3 9 nymphs. Type, allotype and paratypes. 



Corpus Christi, Nueces Co., Texas, July 29, 1912, (H.), 1 9 

 nymph; October 20, 1905, (F. C. Pratt), 2 9 , [U. S. N. M.]. 



Wades, Nueces Co., Texas, May 21, (E. A. Schwarz), 1 cf , [U. S. 

 N. M.]. 



