/T-n 3f 



7-21. 

 HETERONEURA ALBIMANA. 



Order Diptera. Fam. Muscidae. 



Type of the Genus, Heteroneura albimana Meig. 

 Heteroneura Fall., Meig., Macq., Curt. 



AntenncB inserted in a cavity in the middle of the face, porrected, 

 short, 5-jointed, basal joint small subglobose, 2nd very much 

 longer, cup-shaped, vi'ith numerous strong bristles in front, 2 of 

 them very long, 3rd joint the largest, suborbicular, compressed, 

 densely pubescent, 4th a minute joint seated on the back of the 

 3rd, but remote from the base, 5th a moderate pubescent seta, 

 thickened at the base (3). 



Trophi small. Labrum very short, elongate -trigonate (1 b). 

 Tongue not longer, linear, the apex rounded (c). 

 Maxilla none. Palpi exserted, very large, as long as the lip, 

 clavate, pubescent and bristly (/). Lip short and stout, the 

 apex bilobed and hairy (^g). 

 Head rather small, transverse, crown broad and bristly ; face trans- 

 verse-ovate, slightly concave, rather narrow, inclining, hyposti m 

 flat, with 2 long bristles at the extremity : eyes moderate, sul ■> Ate, 

 remote in both sexes : ocelli 3 in a compact triangle on th crown. 

 (2. the profile, * the face). Thorax elongate-ovate, without any 

 transverse suture, bristly : scutel semiovate, the apex elevated and 

 firmed with 2 bristles. Abdomen slender and linear, 6-jointed, the apex 

 obtuse in the male, acute in the female, with the oviduct often exserted. 

 Wings long and decumbent, 1 very short subcostal nervure not ex- 

 tending a fourth of the iving ; 3 longitudinal and one oblique mar- 

 ginal nervures, 2 short transverse ones approaching each other, be- 

 fore the middle, forming a short narrow discoidal cell: halteres 

 small, capitate and uncovered. Legs moderate, anterior a little the 

 shortest : thighs not stout, 4 anterior with long bristles beneath : 

 tibiae slender and simple, pubescent with 2 short bristles at the apex: 

 tarsi as long, slender and 5-jointed, basal joint elongated, compressed 

 and the stoutest in the anterior, 5th and 6th short : claws and pnlviWi 

 small. 



Albimana Meig. — Curt. Guide, Gen. 1340. 2. 



Ferruginous-ochre, clothed with very short pubescence and a 

 few black bristles. Eyes brassy green when alive : seta of the 

 antennae and a spot at its insertion piceous, back of head and 3 

 short united stripes at the fore part of the thorax piceous, a 

 whitish streak on each side before the wings, and 2 pale brown 

 stripes down the back : abdomen shining piceous : wings iri- 

 descent and slightly tinged with fuscous, a large portion of the 

 apex brown, dark at the costa and vanishing below, a spot of the 

 same colour on the transverse nervures ; halteres whitish : legs 

 ochreous, tips of anterior thighs piceous outside, their tibia", 

 excepting the base and the 1st joint of the tarsi black, the 4 

 following joints whitish, hinder tibiae with a fuscous spot near 

 the base. 



In the Author's and other Cabinets. 



