AMERICAN DIPTERA. 245 



the genus Ardoptera, as is seen from its venation, but is more closely 

 related with the Clinoceras on account of the conformation of the 

 mouth and the shape of the head. 



(Jlinocera fuscipeunis Loew. 

 Zeitschr. f. ges. Naturw., 1876, p. 324. 



Piceous, front and face concolorous, dorsum of thorax not vittate, legs fuscous, 

 wings wholly, uniformly subfuscous, stigma scarcely darker, costa free from 

 setulae, second submarginal cell narrower than the end of the first, last section 

 of the fourth vein exceeding by a little the length of the discal cell. 2.5 mm. 



New Hampshire (Osten Sacken). 



C'linocera macalipes Bigot. 

 Bull, de la Societe Zool. de France, 1887. 



Black ; antennse, halteres and legs pale yellowish ; front black ; femora spotted 

 with pale fuscous on the underside near the tip; tarsi narrow, black apical ly ; 

 wings hyaline. 2 mm. 



California. 



HYBOTIN^. 



HYBOS Fabricius. 



Small, slender, almost glabrous species, of generally shining black 

 color. Antennae short, apparently two-jointed, the terminal bristle 

 long. Eyes bare, contiguous above in both sexes. Thorax promi- 

 nent, hunched ; abdomen long and slender, curved downward. Hind 

 femora long and thick, bristly beneath. Wings unspotted, varia- 

 ble in color ; second vein straight, third vein simple ; discal cell 

 longer than the second basal, rounded at tip; anal angle large, 

 rectangular. 



In as much as Walker, Bellardi and Loew have each described a 

 different species of Hybos as dimidiatus, it may be well to revise 

 the names here to avoid further confusion. Therefore Walker's spe- 

 cies* from Brazil having priority may remain. Loew's dimidiatus^ 

 originally described from Cuba may be called eledus ; while the 

 Mexican species of Bellardi % may hereafter be known as sequens. 



Costa rounded, bearing strong spines spiiiicosta Wh. et Mel. 



Costa straight, without spines 2. 



2. Posterior femora strongly toothed beneath, much swollen ; wings wholly 



fuliginous (Brazil) LacUstomyia insolita gen. et sp. nov. 



Posterior femora more slender; wings at least in part hyaline 3. 



* Walker, Insecta Saundersiana, p. 205, 1856. 

 t Loew, Wien. Ent. Monatschr., v, 36, 1861. 

 X Saggio Dipt. Mes., ii, 97, 1861. 



TRANS. AM. ENT. SOC, XXVIII. JULY, 1902. 



