The Lomatina may easily be distinguished from the other Bombylidæ by the following characters:

Front very large; antennæ shorter than the head, the third joint at least twice as long as the first, taperirg to the tip, or suddenly contracted near its base, the terminal portion styliform; terminal style minute. Proboscis never projecting more than one half its length beyond the hyperstoma. Front and face when viewed from the side form a gentle curve, never greatly produced at base of antennæ. Wings with two submarginal and four posterior cells; furcation of the second and third veins occurs before the small cross-vein at a distance of at least twice the length of that cross-vein. All of the tibiae bristly.