390 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 53. 



the segments before the black are brown or ferruginous, each with a 

 large black central spot, pointed posteriorly. 



Miocene shales at Florissant (George Wilson.) 



Holotijpe.—Cat No. 63455, U.S.N.M. 



PALEOTAXONUS VETUS, new species. 



Length, 12 mm. ; anterior wing, 9 mm. ; width of abdomen, 3.25 

 mm.; head and thorax dark; legs apparently ferruginous; abdomen 

 pallid, each segment with a median dusky patch and one at each side ; 

 wings perfectly clear, with ferruginous stigma and veins. Venation 

 normal for the genus, with the characteristically formed first dis- 

 coidal (which separates it at once from Eriocampa) , the basal nerv- 

 ure meeting transversomedial, anal cell with oblique cross-vein, etc. 

 The cubitellan cell is remarkably long. 



The following measurements are in microns : Stigma be3''ond origin 

 of interradial vein, IGO; first radial cell on third cubital, 832; first 

 radial on second cubital, 1200; second radial on third cubital, 352; 

 second cubital on first discoidal, 240; second cubital on second dis- 

 coidal, 1200; lower side of second discoidal, 1728. Hind wing: Up- 

 per side of cubitellan cell, 1680; cubitellan on discoidellan, 720; dis- 

 coidellan on submediellan, 400; discoidellan on brachiellan, 800. 

 I hesitated to separate this from P. trivittatus Rohwer, but it seems 

 to be a distinct species, being larger, with the interradial vein placed 

 as in P. typicus Brues. There is an intercostal vein. The very long 

 cubitellan cell appears to be quite distinctive. 



Miocene shales at Florissant (George Wilson). The specimen first 

 studied lacked the ends of wings and abdomen, but these are present 

 in the reverse, later noticed in the collection. 



Holotype.—Q^X. No. 63456, U.S.N.M. 



ERIOCAMPOIDES MIMUS, new species. 



Length, a little over 7 mm. ; anterior wing, about 5.75 mm. ; abdo- 

 men, 4.9 mm. long. Head black; thorax brown; the mesothorax pale; 

 abdomen pallid, the apical 1.4 mm., dark fuscous; wings hyaline; 

 stigma and nervures ferruginous ; structure of wings nearly as in the 

 living E. aethiops. Stigma truncate at end, hardly produced beyond 

 origin of interradius, which is nearly vertical; interanal very 

 oblique; anal cell contracted as usual. Measurements in microns: 

 Third cubital cell on first radial, 448; first discoidal on median cell, 

 880 ; first discoidal on submedian, 368 ; first discoidal on first brachial, 

 592; lower side of first brachial, about 1280; submedian on second 

 anal, 752; submediellan on brachiellan, 672. This looks like E. mi- 

 crarche Cockerell, but the wing-measurements {e. g.^ the long first 

 brachial cell) are very different. 



Miocene shales at Florissant (George Wilson). 



Holotype.—C^it. No. 63457, U.S.N.M. 



