SYNOPSIS OF NORTH AMERICAN SYRPHID^. 197 



Helophilus porcus. 



Eumerus 2)orcus Walker, List, etc., iii, 551. 



Habitat. — HikIsod's Bay Territory (Walker). 



"9. Length of the body 3-4 Hues; of the wings [spread] 6-7 lines. 

 Niger, thorace cinereo quadrivittato, abdomine maculis nigris nitentibus 

 eanisque ornato, antennis piceis, pedibus nigris, genubus tarsisque fer- 

 rugineis, alls subcinereis. 



"Body black, clothed with black hairs; head covered with white 

 bloom, and clothed with white hairs beneath, pale yellow in front and 

 around the base of the feelers; mouth black; feelers |>itchy; bristle 

 black; eyes brassy black; all the facets small; chest adorned with four 

 gray stripes; breast tinged with gray; abdomen elliptical, deep velvet- 

 like black, longer and a little broader than the chest; each segment 

 adorned with a triangular, black, shining spot in the middle, and with 

 a hoary spot on each side; hind borders shining; legs black; knees and 

 feet ferruginous, the latter pitchy towards the tips; foot-cushions and 

 claws tawney; tips of the claws black; hind thighs thick, unarmed; 

 hind shanks curved; wings pale gray; wing-ribs and veins black; veins 

 pitchy towards the base; poisers yellow." — Walker, 1. c. 



"Is a very peculiar species; it is represented in the British Museum 

 by two ((? and 9) well-preserved specimens. I have never seen it else- 

 where."— Osten Sacken, Cat. Dipt., 250, note 235. 



Helophilus flavifacies. 



Helophilus flavifacies Bigot, Aun. Soc. Ent. Fr., 1883, 344. 



Habitat. — Maryland (Bigot). 



$ . Long. O™'". Antennis testaceis; facie pallide flava, fronte superne 

 fiisca; thorace uigro, vittis quatuor flavis; scutello fulvo; abdomine 

 nigro, utrinque tribus maculis trigonis, marginibiis segmentorum 3 et 

 4, 5" to to, flavo pictis; calyptris et halteribus testaceis; pedibus pallide 

 fulvis,femoribus posticorum apice, tibiis id. basi et apice,fusco annulatis, 

 tarsis posticis obscure fulvis; alis pallidissime flavis. 



Autennes fauves; face d'un jaune blanchatre; front de meme couleur, 

 la moitie superieure brune; thorax d'un noir opaque avec quatre bandes 

 longitudinales jaunes, Hancs converts d'un duvet jaunatre; 6cusson 

 fauve, legerement teiut de noiratre a la base et sur les cotes; abdomen 

 d'un noir opaque, les segments 2®, 3® et 4® avec, de chaque cot^, une 

 macule trigouale, la moins grande au 3% fauves, bords posterieurs des 

 3*^ et 4® segments testaces, 5^ entierement d'un jaune testace; pieds d'un 

 fauve pale, les posterieurs avec trots anneaux bruns, I'un, sis a I'extremite 

 des cuisses, les deux autres, sur les tibias, tarses posterieurs d'un fauve 

 brunatre; ailes tres legerement jaunatres. 1 specim. — Bigot, 1. c. 



Helophilus Novae Scotiae. ^ 



Helophilus Novcv Scotice Macquart, Dipt. Exot., 2« Suppl., 60, 10. 



Habitat. — '^ovu Scotia (Macq.). 



9. Long. 12.5""". Ater. Thorace vittis Jiavis. Abdomine fasciis albidis. 

 Antennis pedibusque nigris ; tibiis basi rufis. 



