S. IT. Scudder — Miocene Insecf-Faann of OEningni. ' 121 



is very faint. The twelfth stria, countiiif^ from the sutural edge, 

 terminates abruptly a little beyond the middle of the distal half of 

 the elytra, and the four adjoining strife on one side unite with their 

 mates of the other side, by curving around its extremity in wider 

 and wider curves, while the sixth and seventh unite in a similar but 

 much more angular fashion wilh the eighteenth and seventeenth. 

 In like manner the twenty-fourth stria from the sutural margin 

 terminates almost exactly at the middle of the distal half of the 

 elytra, and the twenty-second and twenty-third striee unite with, 

 tlie twenty-sixth and the twenty-fifth around its extremity. One 

 elyti'on (that figured No. 4873) is 16 mm. long, and 5-25 mm. broad ; 

 a second (No. 4878) less perfect one is a trifle larger. The form of 

 elytron is almost precisely that of C. tiauckiaimm, Heer, from 

 CEningen, but has a slightly more produced apex. The species may 

 be called Calosoma Heeri. 



Among the Diptera, a single specimen occurs of a new generic 

 type of Tabanid^, allied to Tahanus, in which the upper sinuate 

 branch of the third longitudinal vein is widely forked at the tip, 

 and the lower branch, curving downward, terminates not on the 

 border of the wing but on the upper branch of the fourth longi- 

 tudinal vein just before its apex (No. 7056). Thei-e are two species 

 of Tipula, at least one of them a Tipida in the narrowest sense. 

 The Bibionidse consist of three species of P/ec/a and two oi Penthetria, 

 none of which can be referred to described species. 



There is a single specimen (No. 6893) of a minute fly, unusually 

 well preserved, indicating a new genus of Mycetophilidee, which may 

 be called Necromyza (veKpos, fiv^w). The marginal vein of the wing 

 reaches the end of the subcostal ; the auxiliary vein impinges on 

 the subcostal just beyond the origin of the cubitus, which arises at 

 about two-fifths the distance from the base to the apex of the wing ; 

 the brachial cross- vein is at the middle of the wing; the second 

 posterior cell extends back to the humeral cell itself, and the fourth 

 posterior cell is even longer, reaching as far as the middle of the 

 humeral cell. These characters easily distinguish it from any 

 Mycetophilidse known to me, the most nearly allied being, perhaps, 

 Brachypeza. The hind thighs are stout, longer than the thorax; 

 the hind tibiae, which are twice as stout at apex as at base, are 

 armed with a pair of stout apical spines half as long as themselves, 

 while the hind tarsi are half as long again as the tibiee. The insect 

 is 3 mm. long. The wings are faintly fuliginous, and the antennae, 

 chancing to converge in front of the head, give an appearance of 

 a long beak. It may be called Necromyza pedata (PI. VI. Fig. 5). 



The only other Diptera of interest are three species of Cecidomyiaa 

 galls, one probably to be referred to Cecidomyia Bremii, Heer. 



Among the Hymenoptera, the ants comprise the bulk of the 

 material, and there seem to be several new species of Formica and 

 Myrmica, besides some others of uncertain position, but certainly 

 new, and still others falling near Sima and Frionomyrmex. There 

 is a species of Spliex, a genus already recognized by Schoberlin, 

 but not by Heer, and an insect which may possibly be Bombiis 



