494 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



of tip of wing, end of R^ 40 m basad of same level, end of M^ 480 /x 

 basad of same level. 



Oligocene at Gurnet Bay (Brodie). Lacoe Coll. 7576. The rather 

 pointed wingtip and general appearance indicate the reference to Psy- 

 choda, though R^ does end distinctly below the wingtip. The species 

 is much larger than the Psychoda and Pericoma described by Meu- 

 nier from Baltic amber. 



No. 7517 (Gurnet Bay) is also P. primaeva. 



Holotype.—C&t. No. 61441, U.S.N.M 



PROTOEERIS, ne^Tv genus (Stratiomyidae). 



Abdomen elongated, parallel-sized, exactly as in Beris, with seven 

 very distinct segments showing. The rock is broken in such a 

 manner as to leave only the abdomen and a wing, but the basal seg- 

 ment of abdomen shows no sign of overlapping spines, and the insect 

 was probably without them, as is the living Allognosta. Wings long, 

 extending about 1.5 mm. beyond abdomen; costoapical region dark, 

 much as in Acanthina; only part of the venation can be made out, 

 but evidently the discal cell was long, probably as long as in Xylo- 

 myia; the rather long praefurca certainly does not emit the second 

 vein (as it does in Beris), this must have arisen further on, as in 

 Allognosta and Chorisops; the anterior crossvein, instead of being 

 vertical as in Beris, is strongly oblique, seeming to be a branch of the 

 fourth vein; the third vein is arched at end, reaching the margin at 

 a very acute angle near the end of the wing, and emitting some 

 distance before an only moderately oblique upper branch. 



Genotype. — Protoheris ohliteratus, new species. 



PROTOBERIS OBLITERATUS, new species. 



Plate 63, fig. 1. 



Abdomen black, 5.2 mm. long and 1.8 wide. Wing about 8 mm. 

 long, dusky, costoapical region dark fuliginous. The following meas- 

 urements are in fi: Length of praefurca, 560; length of anterior cross- 

 vein, 160; length of anterior branch of third vsin, 320; anterior 

 branch of third vein to end of lower branch, about 1,120; fork of 

 third vein to upper branch of fourth (vertically), 720; upper branch 

 of fourth to lower branch, at same level, 640. 



Oligocene at Gurnet Bay (Brodie). Lacoe Coll. 7550. 



Holotype.—C&t. No. 61442, U.S.N.M. 



STRATIOMYS BRODIEI, new species (Stratiomyidae). 



Plate 62, fig. 8. 



A species of the type of S. chamaeleon Linnaeus, with large tri- 

 angular lateral markings on abdominal segments, the pale triangles 

 on the first segment about twice as broad laterally as on the second; 

 abdomen about 5 mm. long and 4 broad, shaped as usual in the 



