DIDEA.— ALLOGKAPTA. 19 

 Oregon 2 , California 2 , New Mexico. — Mexico, Omilteme in Guerrero 8000 feet (H. 



A single female specimen from Guerrero, difFering from the more typical examples 

 only in the femora having less black, and the wings being more yellowish. 



2. Didea coquilletti, sp. n., 6 2 . (Tab. I. %g. 9, <J ; 9a, head.) 



Eyes bare ; third lougitudinal vein deeply sinuous. The abdominal bands reach quite to the lateral 

 margins. Eace, front, and cheeks wholly light yellow, shining, except the golden-pollinose orbital 

 margins ; in the female the upper part of the front blackish, with yellow pollen. Antennae red ; third 

 joint black above, obtusely oval, smaller than in D. laxa. Mesonotum shining bronze-green, the lateral 

 margins yellow, clothed with yellow pile. Pleurse chiefly yellow, with yellow pile ; for the rest 

 shining blue-black, as is also the pectus. Scutellum translucent yellow, with black pile. Abdomen 

 opaque black, with yellow cross-bands ; first band interrupted, the oblique spots reaching the margins 

 broadly ; second and third bands narrowed before reaching the margins, emarginate in the middle behind ; 

 fifth segment with a yellow band in front. Legs yellow, the tip of the hind metatarsi blackish, the 

 remaining joints black ; hind tibia^ sometimes brownish. Wings nearly byaliue ; stigma brownish-yellow ; 

 third vein strongly curved into the first posterior cell. 



Length 9-12 millim. 



Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 

 Three males and three females. Dedicated to Mr. D. W. Coquillett. 



ALLOGRAPTA. 



Allograpta, Osten Sackeu, Bull. Buffalo Soc. iii. pp. 49, 63 (1877). 



l. Allograpta obliqua. 



Scava obliqua, Say, Journ. Acad. Pliil. iii. p. 89 1 ; Complete Writings, ii. p. 78 ' 2 . 



Syrphus obliquus, Say, Amer. Ent. t. 11. fig. 2 3 ; Complete Writings, i. p. 23 1 ; Wiedem. Aussereur. 



zweifl. Ins. ii. p. 138 3 j Schirier, Reise der Novara, Diptera, p. 353 6 . 

 Allograpta obliqua, Osten Sacken, Bull. Buffalo Soc. iii. p. 49 7 ; Cat. Dipt. 2nd ed. p. 126 9 , and 



note 214; v. d. Wulp, Tidjsclir. v. Ent. xxvi. p. 1, t. h £ V :, Willist. Synopsis N.-Am. 



Syrphid», p. 96 ,0 . 



Syrphus securiferus, Macq. Dipt. Exot. ii. 2, p. 100, t. 16. fig. 10 u ; P 1 Suppl. p. 139 l2 . 



Stjrphus bacchides, Walker, List. Dipt. iii. p. 594 l3 . 



Syrphus signatus, v. d. Wulp, Tijdschr. v. Ent. x. p. 144, t. 4. £. 12". 



Hab. North America 1 3 5 7 8 11 12 14 , Washington 10 , New Hampshire 10 , Con- 

 necticut 10 , Colorado 10 , Kentucky 10 , Florida 13 , California 10 .— Mexico, Amula 6000 

 feet, Chilpancingo 4600 feet, Xucumanatlan 7000 feet, Cuernavaca (H. H. Smith), 

 Mexico city (H H Smith, Schumann).— South America 6 , Argentine Republic 9 . 



Fifteen specimens from Mexico, agreeing with others from New England. 



d 2 



