NO. 2181. NEW TERTIARY INSECTS— COCKERELL. 381 



Florissant, in the miocene shales. Closely resembles A. atavella 

 Cockerell, but easily distinguished by the dusky wings, strong auxili- 

 ary vein ending much nearer base of wing, and thorax longer and less 

 convex in profile. It certainly represents a distinct genus from A. 

 atavella, but it is impossible to place these fossil Anthomyidae in the 

 genera of modem authors, which are separated principally on char- 

 acters we can not see. 



Type.— Ceit. No. 62541, U.S.N.M. 



THYSANOPTERA. 



AEOLOTHRIPS BRODIEI, new species (Aeolothripidae). 



Plate 31, fig. 12. 



Length about 1.3 mm. ; head and thorax poorly preserved; abdomen 

 large, dark brown, with hyaline sutural bands (caudal bristles not 

 visible, being embedded in rock); wings short, not nearly reaching 

 end of abdomen; venation as usual in the genus, the two longitudinal 

 veins very distinct, the first, at least, with minute bristles; cross- veins 

 placed practically as in Orothrips Icelloggii Moulton, the one connecting 

 the longitudinal veins oblique as in that species ; the cross-veins from 

 first longitudinal to costa are subobsolete, but two seem to be indicated, 

 the two from second vein to lower margin are more distinct; the 

 bristles of the costal region are short, and those of apex and inner mar- 

 gin are less than twice as long. Wings pale brownish, not banded, 

 veins brown. The following measurements are in microns : Length of 

 abdomen, 975; width of abdomen, 400; width of wing, 175; length 

 of costal bristles, 32; length of bristles at apex of wing, 50; cross-vein 

 between longitudinal veins to second cross-vein from second longitu- 

 dinal to margin, 160; second cross-vein from second longitudinal to 

 margin to end of second longitudinal, 175. 



Ohgocene: Gurnet Bay (Brodie; British Museum, I. 8547). This 

 may not belong to Aeolothrips in the most restricted sense, but it 

 appears to show no distinctive characters excluding it from the genus. 

 In the absence of banding on the wings it resembles AnkotJirips Craw- 

 ford, but that has narrower, much more bristly wings. 



NEUROPTERA. 



SISYRA(7) DISRUPTA. new species (HemerobUdae). 



Plate 31, fig. 13. 



Represented by part of the apical region of a wing which must have 

 been about 5 mm. long. It appears to be referable to the Sisyrinae 

 (Sisyridae Handlirsch), and has exactly the texture and general ap- 

 pearance of the wing of modern Sisyra {S. vicaria Walker, collected 



