NO. 2119. BRITISH FOSSIL INSECTS—COCKERELL. 497 



SPHAEROCERA SEPULTULA, new species (Borboridae), 

 Plate 63, fig. 3. 



Wing about 1.8 mm. long, broad, grayish, with dark veins, except 

 the second, which is perfectly colorless; thorax convex in lateral 

 profile. This is referred to Sphaerocera on account of its general 

 appearance; the form of the costal cell; the long second vein with a 

 gentle curve, the convexity whoUy upward; the discal cell narrow 

 apicaUy; the anterior crossvein before middle of discal ceU; the sec- 

 ond posterior cell (only base visible) rapidly broadening from the 

 base; and the large anal or axillary field without evident veins. In 

 addition, although the head is very obscure, two large bare black 

 bristles project in front, and are apparently the aristae, which are 

 large and conspicuous in Sphaerocera. The costa has fine short 

 black bristles; the costal region above the costal ceU is well pre- 

 served, but whatever armature there may be is concealed. The fol- 

 lowing wing-measurements are in /i: Tip of costal cell basal of vertical 

 level of end of third vein, 1,216; apex of discal cell basal of vertical 

 level of end of third vein, 832; width of discal ceU at apex, 80; ante- 

 rior crossvein to end of discal cell, 480; to base of discal cell about 208. 



Oligocene at Gurnet Bay (Brodie). Lacoe Coll. 7539. 



Holotype.—C&t. No. 61447, U.S.N.M. 



STENOMYITES, new genus (Ortalididae.) 



Minute flies, referable to the subfamily Richardiinae, or perhaps to 

 the Uhdiinae ; wings of ordinary shape (not narrow and elongated as 

 in Eumetopia) ; auxiliary vein widely separated (160 jx at level of 

 basal corner of marginal cell) from first, running a straight course to 

 costa, with which it imperceptibly merges, as in Macrostenomyia; 

 second basal and anal cells certainly very small, not visible in the 

 specimen, which does not show extreme base of wing; marginal cell 

 a little broader beyond middle than at end, the end a little narrower 

 than that of first posterior (all this essentially as in Eumetopia) ; first 

 basal cell shorter than in many genera, but seeming shorter than it 

 really is, owing to the loss of extreme base of wing; discal ceU long- 



Genotype. — Stenomyites fuscipennis, new species. 



STENOMYITES FUSCIPENNIS, new species. 

 Plato 63, fig. 4. 



Wing with a large apical dark fuscous cloud, much as in Eumetopia, 

 and with a broad rather oblique cloud before the middle; other parts 

 of the wing are more or less marked with brown, but this is indistinct. 

 The following measurements are in fx: Marginal ceU on first basal, 

 400; greatest width (depth) of marginal ceU, 256, and its width at 



81022°— Proc.N.M. vol.49— 15 32 



