116 DIPTEEA. 



So far according to Wiedemann. A Mexican specimen (collected by Truqui) m 

 Prof. Bellardi's collection is easily identified as belonging to this handsome species 

 of tropical aspect. 



In A. cyanoptera the proboscis projects considerably beyond the oral margin ; the 

 face is conical ; the front tibiae are smooth ; the front tarsi slender, smooth, slightly 

 tapering, with indistinct joints; the contact of the fourth posterior cell and the 

 discal almost punctiform ; the anterior branch of the third vein with a stump ; a 

 small stump in the third posterior cell. Wiedemann's reference to the venation I do 

 not quite understand. 



2. Anthrax lucifer. 



Anthrax lucifer (Fabr.), Wiedem. Aussereur. zweifl. Ins. i. p. 294 \ 

 Edb. Mexico, Cuantla (de Saussure 1 ). — West Indies 1 . 



I translate Wiedemann's description : — 



" Nigra, flavido-tomentosa ; abdomine fasciis nigris; alis fuscis; basi areaque costali 

 ferrugineis. — Long. 12 millim. 



" Antennae black, first joint reddish : face, cheeks, and. front yellowish (wax-colour) ; 

 the front with a black pubescence ; vertex black. Thorax with a yellowish tomentum, 

 and with paler hairs on the sides ; the collar of hairs in front of the thorax yellowish ; 

 the rubbed off scutellum chestnut-brownish at the tip. Abdomen with the sides every 

 where beset with golden-yellow hair, its upperside likewise clothed with appressed 

 golden-yellow hairs; each segment, however, has a black posterior margin, which 

 is attenuate on both sides, especially on the more proximal segments (the abdomen 

 might just as well be described as black with yellow cross-bands at the base of the 

 segments). Venter blackish, with pale yellow, appressed hairs. Wings brown, the 

 costal vein blackish-brown, but the costal cells, the second, third, and penultimate veins, 

 and the interval between these veins from the root upwards to a certain distance, 

 ferruginous-yellowish. Halteres ferruginous-yellow, with a whitish knob. Legs black, 

 with a yellowish tomentum (collections of Fabricius and Wiedemann)." 



Two specimens from Cuantla, Mexico (coll. Bellardi), agree with this description. 

 In the ' Western Diptera,' pp. 240, 241, I have noticed the probable occurrence of this 

 species in Texas, and also the existence in the United States of conflicting forms. The 

 front legs are of the Exoprosopa-ty^e. 



3. Anthrax arethusa, sp. n., e $ . (Tab. II. fig. 11.) 



Edb. Mexico, Northern Sonora (Morrison), Presidio (Forrer), Orizaba (Sumichrast) ; 

 Guatemala, near the city (Champion) ; Costa Rica, Irazu (Bogers). 



I distinguish under this name a series of specimens, principally from Central 

 America and Mexico, which resemble A. alcyon, Say, in having the third posterior cell 

 bisected, but which, at the same time, show marked differences. A. alcyon has a more 



