20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. lO/ 



ANTHRAX ORNATA. 



Order Diptera. Fam. Anthracidae Lat, 

 Type of the Genus Anthrax flava Hgg- 



Anthrax Scop., Fab., Lat. Musca Linn. 



AntenncE porrected, remote, 3-jointed, the first article cyllndric, 

 clavate, twice the length of the second ; with long and thick 

 tufts of hair; second nearly globular and hairy j third nearly 

 naked, somewhat pear-shaped, with a long style terminated by 

 a tuft of hair, or ovate with a I- or 2-jointed style. (3.) 

 Head subglobose, with 3 stemmata placed upon a little tubercle : 

 eyes reniform, converging behind, green when alive. (2.) 

 Trophi either entirely concealed, or projecting a little beyond the 

 head. (1 . a. part of the head which receives the trophi, and which 

 came away with them upon dissection.) 



Labrum (1 . b.) horny, acute, convex above, concave beneath, in- 

 closing the tongue. 



Tongue considerably longer than the labrum, corneous, acumi- 

 nate, (i.e.) 

 Mandibles none. 



Maxilla (I.e.) horny, linear, acute, nearly as long as the labrum. 

 Palpi 2, received into the cavity of the mouth, simple, cylindric, 

 hairy, attached to the side of the maxillae near the base, half their 

 length, (l.f.) 



Mentum? cylindrical, hollow above to receive the tongue and 

 labrum. (1. h.) 



Lip fleshy, oblong, bipartite, ribbed, extending as far as the 

 tongue, (l.g.) 

 WtVi^ level with the thorax. Body 7-jointed, short, nearly quadrate, 

 abruptly acuminated behind. Wings divaricating, long, lanceolate. (9.) 

 Halteres often concealed in the hair of the body. Posterior legs the 

 longest. Tarsi 5, sometimes terminated by 3 claws : pulvilli obso- 

 lete. (8.) 



A. ORNATA Hoffmansegg. 



Black shining : Head covered with black hair between the eyes, 

 silvery behind, clypeus and under side of head with golden hair. 

 Thorax covered with ochraceous hair before, nearly naked in the 

 centre. Scutellum brownish. Abdomen covered with short golden 

 hair, the sides surrounded with alternate fasciculi of fine white 

 and black hair, 3rd and 4th segments with white fasciae interrupted 

 in the middle, sixth with a white spot in the centre, last joint 

 very white with hair. Wings transparent, many-nerved, with a 

 brunneous cloud extending two thirds the length, sinuated at 

 the posterior margin, with a transverse transparent spot near 

 the base, a larger one in the centre, and 2 others near the mar- 

 gin at the union of the nerves. Legs black, femurs and tibiae co- 

 vered with close yellow hairs. Halteres yellow. 



In the Cabinets of Mr. Dale, Mr. Bentley, and the Author. 



Fig. 12. — Facsimile of page from first edition. 



