1914.] NATURAL SCIENCES OF PHILADELPHIA. 107 



Ana County, New Mexico. August 16, 1898. (Cockerell.) [Scud- 

 der Collection.] 



Description of Allotype. — Characters not specifically mentioned 

 are not markedly different from those of the male sgk or of the female 

 of the closely allied D. castanea. Pronotum with the whole form 

 slightly more compressed than in castanea. Tegmina small, little 

 l^roader than the apparent length of the same, reaching the caudal 

 margin of the metanotum, distal margin broadly rotundato-rectan- 

 gulate, the interspace between the tegmina subequal to the width of a 

 single tegmen. Ovipositor slightly surpassing the length of the 

 head and pronotum together, considerably arcuate, proximal depth 

 distinctly less than a third of the length of the ovipositor, ventral 

 margin moderately arcuate, not at all flattened, dorsal margin very 

 slightly more arcuate clistad than proximad, apical margin proper 

 acute-angulate, armed on the distal third of the dorsal margin with 

 seven teeth, ventral margin considerably arcuate distad, armed with 

 nine spines, those of both margins similar to those found in castanea; 

 subgenital plate with the lateral angles produced into distinct spini- 

 iorm lobes equal in length to the main depth of the plate, median 

 •emargination of the plate much as in castanea. Cephalic femora 

 slightly inferior to the combined length of the head, pronotum and 

 tegmen. Caudal femora slightly longer than the body, appreciably 

 weaker than in castanea. 



Paratypic Series. — We have examined all three specimens on which 

 Scudder based the species, one being selected as the single type, 

 another as the allotype, the third (Mesilla Park, September 11, 

 'Cockerell) remaining as a paratype. 



Measurements {in millimeters) . 



Mesilla Park, Sycamore Canyon, Average of three; 

 N. M. (Type). Pima Co., Ariz. Tmnamoc Hill, 



Pima Co., Ariz. 



Length of bodv : 15.5^3 14.8 13. (12.5-13.6) 



Length of pronotum 4.3 4. 3.9 ( 3.8- 4. ) 



'Greatest caudal width of 



disk of pronotum 3. 2.7 2.5(2.2-3.) 



Length of tegmen 4.4 4.2 3.8(3.5-4.1) 



•Greatest width of discoidal 

 and anal fields of teg- 

 men 3.5 3.1 2.9(2.9-3.) 



Length of cephalic femur 9.2 10. 8.3(7.7-9.2) 



Length of median femur 10.3 10.8 9. ( 8. -10. ) 



Length of caudal femur 21.3 22.8 19.1(17.-21.3) 



2' Scudder's original measurements of this specimen are: body, 14; pronotuni, 

 43.7;2;cephalic femur, 11; caudal femur, 21. The discrepancy in body length is 



