SYNOPSIS OF NORTH AMERICAN SYRYHID^. 177 



nent in front: mouth pitchy : feelers pitchy : bristle fenugiuous, 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 mid- 

 dle, and with 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." — Walker. 



^'Syrphus oestriformis Walker is a rather peculiar Eristalis, repre- 

 sented by a single specimen in the British Museum." — Osten Sacken. 



Eristalis parens. 



Eristalis parens, Bigot, Ann. Soc. Ent. Fr,, 1880, 216. 



Habitat — North America (Bigot). 



^. Long. 13'""'. Oculis hirtis, cheto basi breviter villoso {U. arhiLS- 

 torum simillimo). Antennis castaneis; facie nigra, utrinque cinereo 

 obscuro villosa; thorace nigro, dense fulvo velutino; scutello fulvo; 

 calyptris testaceis; abdomine, segmento secundo, utrinque, macula 

 lata, trigona, fulva, tertio maculis simillimis, sed angustioribus, cunctis 

 anguste fulvo marginatis; femoribus obscure castaneis, geniculis et 

 tibiis pallide testaceis, apice late castaneis, tarsis obscure rufis, apice 

 parum infuscatis; alls fere hyalinis, basi, et, extrinsecus, dilute et 

 pallidissime infuscatis. 



Resemble 4 I'arbustorum. Yeux velus, chete brievemeut velu ^ sa 

 base. Antennes brunatres ; face noire, couverte, de chaque c6t^, par 

 un duvet grisatre ; thorax noiratre, convert d'un duvet roussatre assez 

 dense, flancs h polls roussatres ; ecusson d'un testac6 fonc6 ; cuillerons 

 testac^s ; abdomen d'un noir luisant, presque nu, tous les segments 

 finement bord^s de fauve, base du 1*"^ ^ polls grisatres, 2^ et 3«, de 

 chaque c6t6, avec une macule fauve, triangulaire, beaucoup plus 6troite 

 sur le 3% ventre d'un gris jaunatre; pieds d'un brun rougeatre avec un 

 fin duvet gris, genoux et tibias, a la base, d'un testae^ blanchatre 

 deveuant plus fouc6 vers leurs extr^mit^s; ailes presque hyalines, 

 nervures, base, bord externe, d'un roussatre tres-clair. — Bigot. 



ADDITIONAL NORTH AMERICAN SPECIES. • 



Eristalis agrorum Fabricius, Ent. Syst., iv, 285, 27 {Syrphus) ; Syst. antl., 235, 12; 



Wiedemann, Auss. Zw. In8.,ii, 172, 28.— Guadeloupe. 

 Eristalis albifrons Wiedemann, Auss. Zw. Ins., 11, 189; Edder, Stett. Ent. Zeit., 



18S5, 340.— Porto Rico. 

 Eristalis Bellardii, Jjaennicke, Neue Exot. Dipt., 92. — Mexico. 

 Eristalis cubensis Macquart, Dipt. Exot., ii, 2, 42, 19. — Cuba. 



