120 DIPTEEA. 



posterior half of the scutellum, the sides and the tip of the abdomen also more or less 

 rufous, the boundary of the black in the middle of the latter being ill-defined and 

 irregular. Antenna?: basal joints pale rufous, the third joint black; the latter in the 

 shape of an elongated cone, gradually becoming sjtyliform, and with a microscopic bristle 

 at the tip. Face conically projecting; front, besides the fulvous tomentum, with black, 

 erect hair ; proboscis usually withdrawn, sometimes projecting beyond the oral margin. 

 Legs pale rufous, beset with orichalceous scale-like hairs ; front tibise smooth ; tarsi 

 brown beyond the first joint, the front pair tapering, with indistinct joints, and beset on 

 both sides with delicate, erect hairs; ungues very small. Halteres rufous; knob 

 whitish-yellow. Wings pale rufous-brown on the antero-proximal half, greyish- 

 hyaline on the postero-distal ; in the dark portion the veins are mostly rufous, except 

 in some places, especially at the origin of the second vein, and on the cross-veins near the 

 discal cell ; small rounded brown clouds on the proximal ends of the discal cell, and of 

 the four posterior and the two submarginal cells ; proximal ends of the third and fourth 

 posterior cells coincident, or nearly so. Length 7-12 millim. — Seventeen specimens. 



N.B. — It is very probable that A. gorgon, Fabr., from the West Indies, is the same 

 species. Wiedemann's description agrees very well, excepting the mention of black 

 hairs on the sides of the abdominal segments. A few such hairs can only be discovered 

 with the magnifying-glass on the sides of A. edititia. 



Ten specimens from Tres Marias Islands, Western Mexico (Forrer), have the fulvous 

 pubescence replaced by a brownish-rufous one, which, at the same time being less dense, 

 allows the ground-colour to be visible, and thus gives the specimens a very different 

 appearance ; they are much darker, the brown on the proximal half of the wings is 

 darker, &c. Is it a different species ? 



7. Anthrax paradoxa. 



Anthrax paradoxa, Jaenn. Neue exot. Dipt. 31, t. 2. f. 16 \ 

 Hab Mexico 1 . — Poeto Eico (v. Boeder). 



I have a single specimen from Dallas, Texas (Boll), which apparently belongs to this 

 species. The wings are exactly like the figure given by Jaennicke, except the un- 

 important difference that the two small brown dots which, in the figure, are placed on 

 the last sinus of the second vein, are wanting in my specimen. The ground-colour of 

 the abdomen is not black, but reddish, the middle alone being black ; it is entirely 

 hidden under the reddish-fulvous tomentum. The legs are reddish, the tarsi brown 

 (Jaennicke has " pedibus brunneis "). 



In general appearance this species is very like A. edititia, Say, but is easily distin- 

 guished by the strongly bisinuate second vein and the much more distinct brown clouds 

 on the cross-veins. The front legs have the same structure as in A. edititia. The 

 bifurcation of the second and third veins coincides exactly with the small cross- vein, 

 both in my specimen and in Jaennicke's figure. 



