244 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



metallic. Legs black, with white pile; femora at tip, aud tibiae at base 

 and tip, reddish. Wings hyaline ; subcostal cell from tip of auxiliary 

 vein yellowish ; cross- veins faintly clouded. 



One specimen which agrees sufficiently well with Bigof s description 

 of male and female. 



SPILOMYIA.* 



Spilomyia Meigen, Uliger's Magazine, ii, 27?i, 1803. 

 Mixtemyia Macquart, Hist. Nat. Dipt., i,491, 1834. 

 CalUprohola Rondani, Dipt. Ital. Prodr., i, 47, 1856. 



Large robust species, black with bright yellow spots or bands on 

 thorax aud abdomen — wasp-like in appearance. Head hemispherical, 

 broader than the thorax. Antennae porrect, moderately or considerably 

 elongated, the third joint usually rounded, not twice as long as broad; 

 arista bare. Eyes bare, contiguous in the male. Face nearly vertical, 

 gently concave in profile below the antennae, only a little tuberculate 

 below, if at all. Thorax short and broad, considerably convex above, 

 with yellow spots. Abdomen twice or more as long as the thorax, very 

 convex above, usually of nearly equal width throughout, sometimes 

 gently or broadly oval; with yellow bands. Legs strong; hind femora 

 elongate, with a projecting tooth below near the outer part. Wings 

 brownish in front ; marginal cell open, third longitudinal vein nearly 

 straight, the vein beyond the tip of the anal cell is continued outward, 

 nearly parallel to the hind border of the wing. 



Type of genus, 8. diophthalma Linn^, Europe. 



TABLE OF SPECIES. 



l._Second join!: of antennjB much longer than the first ; second segment of the abdo- 

 men with a hroad arcuate yelloAv band, the third and fourth with n slen- 

 der, median interrupted one qnadrifasciata 



Second joint of the antenuie not much longer than the first; abdomen not so 



marked ^ 



2. Abdomen yellow ; first segment, excei^t the lateral angles, black, each of the fol- 

 lowing segments with two narrow black bands, the one on the anterior 



margin entire, the others interrupted hamifera 



Abdomen black, with yc^Uow cross-bands 3 



3._Fir8t and second abdominal segments wholly black, third witli a posterior cross- 

 band, fourth with two, the anterior one interrupted: abdomen broadly 



oval fusca 



First segment with a yellow side spot, the following each with two cross-bands, 4 

 4.— First, third, and fifth cross-bands interrupted (or sub-interrupted) the latter two 



distinctly dilated on the sides 5 



First and third cross-bands entire longicornis 



5.— Pleura? with five yellow spots besides the humtu-al and subalar ones; front of fe- 

 male with a black stripe interrupta 



PleuriB with only four spots besides the humeral aud subalar ones ; front of female 

 yellow across the middle ; scutellum with a yellow, disconnected spot on 

 each side liturata 



• ^TTt'Aof, mountain ; fivia, fly. 



