Genus MORMOTOMYIA, gen. n .

With somewhat the appearance of a spider, or of a long-legged, semi-apterow Scatophaga, devoid of ocelli and halteres (thoughthe latter mayperhaps be represented by a pair of small sessile knobs), with exceedingly small, more or less horizontal, elliptical ovate or lozenge-shaped eyes, and entirely without macrochztz either on head (apartjrom slender vibrissz?),body, or legs; wings vestigial, short, rod-like, muminate, and useless for jlight.

* C j. Bezzi, " Speomyia absoloni, n. gen., n. sp. (Dipt.), eine degenerierte Hohlenfliege aus dem herzegowinisch-montenegrinischen Hochgebirge ": Zoologischer Anzeiger, xliv, Bd., Nr. 11, pp. 504 - 507, figs. 1 and 2, 7 July, 1914; and Atti della Societa Italiana di Sc. Nat . e del Museo Civic0 di Storia Naturale in Milano, vol. liii. pp. 216220, fig. 3, 1915.

-) 2001. Anzeiger, loc. cit. p. 506, 1914.

$ Mormotomyia-fright. fu1 fly (poppwrba, frightful; puia, a fly).

Head (cf. text-fig. 2) large, equal to thorax in its greatest width, and wider than abdomen; vertical triangle extending forwards nearly to anterior margin of front (frons) and ending bluntly; jowls greatly swollen; eyes longer than deep, their horizontal diameter about twice so long as the vertical one, facets convex and relatively coarse; proboscis short, stout and swollen, palpi somewhat clavate; antenns with third segment small, disciform, partly overlapped a t base by extinguisher-shaped second segment, and bearing on its outer side a long, fine, microscopically pubescent arista.

Abdomen: hypopygium of 6 (cf. text-fig. 3) small, with superior claspers outwardly convex, and resembling the two halves of a bivalve shell.

Wings (cf. text-fig. 4) consisting of vestiges of five longitudinal veins in addition to costa, squeezed together in a manner somewhat reminiscent of position of corresponding veins in wing of C r a t z r i m pallida Latr. ( Diptera Pupipara: fam. Hippoboscids), but without any trace of wing-membrane, and ending in a blunt, narrow point.

Legs (cf. text-figs. I and 5) very long; claws large, slender and strongly curved, with, a t base on under side, a downwardly directed, tooth-like process, especially noticeable in case of hind pair; middle and hind claws nearly parallel to longitudinal axis of leg and not a t right angles to it; pulvilli long and narrow, pointed a t tips, with a row of hairs along edges of under side; empodium present, slender and styliform, pointed a t tip; near distal extremity of last tarsal segment, on upper side, a long, downwardly curved hair.

Genotype: Mormotomyia hirsuta, sp. n.