GYMNOSOMA. 11 



to its tip ; discal transverse vein almost straight, parted from the border 

 by hardly less than its own length. Alulae white. 



Kare. In the late Mr. Stephens's collection. (E.) 



Genus IV. GYMNOSOMA. 



GYMNOSOMA, Fal. Rhiz. 9. 1; Latr.; Meig. ; Desv.; Mcq. ; Zett. 

 Mttsca p., L. ; F. ; D. G. ; Schr. ; Geoff. ; Schaeff. ; Gmel. ; Ross. ; 

 Har. ; Pz. ; Lam. ; Don. Tachina p., F. Ocyptera p., Latr. 

 Gymnosomete, Rhizomyza, Fal. Gastrodea, Desv. Gymnosomees, 

 Mcq. ; Westw. 



Corpus breve, latum. Caput mediocre; frons plerumque lata. An- 

 tennae articulo sexto nudo. Abdomen globosum, setis nullis. 

 Body short, broad. Head of moderate size ; front generally broad. 



Fourth and fifth joints of the antennae distinct ; sixth bare. Abdomen 



globose, without bristles. 



1. rotundata, L. F. S. 1838 (1761); F.; D. G. ; Schr.; Gmel.; 

 Ross. ; Pz. ; Fal. ; Desv. ; Latr. ; Lam. ; Meig. ! Zw. iv. pi. 39. f. 21 ; 

 Desv. ; Mcq. ; Zett. cerium, Har. ; Geoff. ; Schaeff. Nigra, capite 

 aurato antice albo, thorace luteo-tomentoso nigro-quadrivittato, alis 

 subcinereis. Long. 3 ; alar. 6 lin. 



Black. Head gilded above, whitish in front, white beneath and 

 behind. Frontalia ferruginous. Facialia without bristles. Epistoma 

 slightly prominent. Antennae longer than the face ; second joint sub- 

 clavate ; third sublinear, indistinctly curved, rounded at the tip, a little 

 longer than the second, testaceous at the base ; sixth stout, testaceous 

 towards the base, a little longer the third. Thorax luteous in front, 

 with four black stripes, the outer pair interrupted. Wings slightly 

 grey, yellowish at the base ; costal vein ending at a little above the 

 tip of the wing ; subcostal vein ending at much beyond one-third of 

 the length ; mediastinal vein ending at much beyond half the length ; 

 radial vein ending at a little before seven-eighths of the length ; cubital 

 vein ending at a little above the tip ; praebrachial vein much curved 

 at its flexure, straight from thence to its tip, which joins the cubital 

 near the tip of the latter ; discal transverse vein very slightly undulat- 

 ing, its distance from the border about one-third of its own length. 

 Alulae large, whitish, with yellow borders. Halteres luteous. Abdo- 

 men luteous, black at the base, and with four black dorsal spots, the 

 first connected with the black at the base, a black spot on each side 

 at the tip. 



Rare. (E.) 



