1S82.] «^-J- [Williston. 



black, remainder yellow ; wings pure hyaline, veins fuscous black, in tlie 

 female with, blackish spots. — Long. corp. 5^-6^ lin., long. al. 4^-5^ lin." 



Eristalis cestriformis Walker, List, etc., iii, 573 (Syrphus). Hudson's 

 Bay Territory. 



"Mas. Niger, thoracis pilis anticis nigris pootecis fulvis, scutello fulvo, 

 abdomine pilis albis nigris fulvisque fasciato, antennis piceis, pedibus 

 nigris, alis limpidis fusco unimaculatis. 



"Body black ; head clothed with dull tawny hairs, shining and promi- 

 nent in front ; mouth pitchy ; feelers pitchy ; bristle ferruginous, downy; 

 eyes pitchy, each with a broad stripe of short black hairs ; all the facets very 

 small ; chest clothed with short black hairs, and on the hinder part with 

 pale tawny hairs ; scutcheon tawny, very thickly clothed with pale tawny 

 hairs ; abdomen nearly oval, broader and a little longer than the chest, 

 clothed with white hairs at the base, with black hairs in the middle, and 

 wMtli bright tawny hairs towards the tip ; legs black, clothed with short 

 black hair ; knees pitchy ; shanks and feet clothed beneath with tawny 

 down ; hind feet tawny ; claws and foot cushions tawny ; tips of claws 

 black ; wings colorless ; large dark brown spot in the disk ; wing ribs 

 pitchy ; veins black, ferruginous towards the base and along the free 

 borders ; poisers ferruginous. Length of the body 7 lines ; of the wings 

 [spread] 14 lines." 



Eristalis alhiceps Macq., Dipt. Exot. ii, 2, 56, 41, Carolina. 



" Ater. Thorace antice duabus fasciis transversus albidis. Abdominis 

 prinio, secundo tertioque segmentis maculis lateralibus flavis. Facie fron- 

 tique albis. Long. 41. (5^." 



"Face testacie, a duvet blancet bande nue, luisante, Partie anterieure 

 du front a duvet et poils blancs. Antennes testacees. Yeux nus. Thorax 

 d'un noir velonte ; la seconde bande transversale sur la suture ; ecusson 

 fauve. Abdomen, les taches laterales laissant un espace etroit entrelles ; 

 celles du troisieme segment n'atteignant pas le sord posterieur ; incisions 

 jaunes ; quatrle me a petits poils noire. Cuisses noires, a genoux fauves ; 

 ,iambes jaunes, a extremite braune ; tarses noirs. Balanciers jaunes. Ailes 

 hyalines ; a base un peu jaunatre ; cellule basilaire externe s'etendant jus- 

 qu'a la moitie de la discoidale. " 



Eristalis parens Bigot, Dipt. Nouv. xxi, Annal Ent. Soc. Fr., 1878, 216. 

 Diagnosis, translation, c^. Eyes pilose, arista at the base briefly pilose 

 (similar to E. arbustorum) ; antennae reddish-brown ; face black, on the 

 sides obscurely cinereous pilose ; thorax black, densely fulvous pilose ; 

 scutellum fulvous ; tegulsa testaceous ; abdomen, second segment, on each 

 side, with a broad spot, triangular, fulvous, third with similar, but nar- 

 rower, spots, narrowly margined with yellow ; femora obscurely reddish- 

 brown, knees and tibite pallid testaceous ; apex broadly reddish-brown, 

 tarsi obscurely red, apex slightly infuscate; wings nearly hyaline, base 

 and external border, dilutely and very pallidly infuscated. Long. 13mra. 

 North America. 



