22 Annals Entomological Society of America [Vol. X, 



Wilson Ranch, Miocene shales of Florissant, Colorado (Wickham). 

 Readily known from the two previously described Florissant Anth- 

 omyiids by the anterior cross-vein being practically at the middle of 

 the discal cell. These fossils cannot be definitely referred to modern 

 genera, many of the essential characters being invisible. There is no 

 doubt that the present insect is generically distinct from the other 

 two, as genera in this family are now understood. 



Electrocyrtoma new genus (Empididae) . 



Minute flies resembling the modern genus Cyrtoma Meigen, but the 

 rather large antennas have a long terminal bristle; hind tibiae and 

 basitarsi not at all thickened; abdomen short, not extending much 

 beyond hind femora; no detached vein in middle of wing below fourth; 

 a considerable interval between separation of third vein from second 

 and anterior cross-vein. Thorax greatly elevated, finely hairy; 

 scutellum prominent, hairy ; humeral cross-vein straight (not oblique) ; 

 discal cell entirely open, but a slight bend in fourth vein at a point 

 where apex of cell probably existed in an ancestor; end of anal cell 

 and of second basal nearly in the same line; legs long and slender, 

 but anterior femora thickened basally, the base about twice as broad 

 as the apex. 



Electrocyrtoma burmanica n. sp. 

 (Fig. 5, wing, antenna and dorsal profile of head and thorax). 



Male. Black, with perfectly clear wings ; length about 1280 microns. 

 The following measurements are in microns: length of antennas, 256; 

 width of anterior femora near base, 80; length of anterior tibias, 352;. 

 length of abdomen (approx.) 640; length of hind femora, 464; of hind 

 tibi«, 416; of hind basitarsi, 208; of wing (approx.), 1040. 



In Burmese amber, received from Mr. R. C. J. Swinhoe. 



The loss of the outer side of the discal cell in the Empididae appears 

 to be a specialization. It is surprising to find in Burmese amber, the 

 fauna of which seems on the whole to possess rather primitive characters, 

 an insect more specialized than the ordinary Empididae of modern times. 

 There is no affinity with any of the species described from Baltic 

 amber. 



COLEOPTERA. 



Myodites burmiticus n. sp. (Rhipiphoridae) . (Fig. 6). 



Length about 3.5 mm. ; head, antennas, prothorax and elytra black, 

 but thorax behind level of elytra and dorsum of abdomen (except toward 

 apex) pallid, probably ferruginous; antennee flabellate, with at least 

 five or six long processes; elytra short, scarcely reaching beyond base 

 of abdomen; wings ample, hyaline, the costa pale ferruginous; legs 

 slender, ordinary. 



In Burmese amber (Burmite), received from Mr. R. C. J. Swinhoe. 



I cannot distinguish this from the modem genus Myodites, but 

 .it is so placed in the amber that it is impossible to get a good view of 

 the details of structure under the microscope. A species of Myodites 

 has been recorded from the Oligocene of Rott, in Germany. The 

 fossil seems to belong to Myodites rather than to Emenadia, which 

 occurs today in the India region. 



