NO. 2337. NEW AMERICAN FOSSIL INSECTS— COCKERELL. 



307 



origin of the third; cubitus gently curved, with seven long simple 

 branches, which are strongly curved apically; anal field with nine 

 veins, the first dividing near base and each division forked, the second 

 foiked near apex, the eighth forked. 



This differs conspicuously from the type of Atimoblalta in the 

 broader tegmen and the flexuose branches of cubitus, but it does not 

 seem advisable to propose a new generic term at present. There is 

 also some resemblance to Farelthohlatta. These forms are related in 

 a general wa}^ to Archimylacris and appear to represent an earh' 

 type of Archimylacridae. 



UolotAjpe.—C^t No. 64348, U.S.N.M. 



2. BEETLES FROM THE EARLY TERTIARY ROCKS OF COLORADO. 



Recent investigations have shown that in the region of North Park, 

 Colorado, there exist rocks of early Tertiary age containing elytra 

 of beetles. Two of these insects were described under 

 the names Calandrites hindsi and OfKryastites hender- 

 soni} Additional material recently received from 

 the United States Geological Survey includes two 

 species, one of which proves to be 0. hendersoni, while 

 the other is considered new. At the same time I 

 find two more new species in the museum of the 

 University of Colorado, and these are herewith de- 

 scribed. The fauna or faunae represented by these 

 remains must be considerably older than the beds 

 from which Scudder obtained his Eocene beetles. 

 With the elytra alone, accurate generic determina- 

 tions are impossible; and indeed, considering the 

 antiquity of the fossils, they probably belong to other 

 than the modern genera which they most resemble. The deposits are 

 doubtless of fresh-water origin. 



CARABITES (?) ARAPAHOENSIS, new species. 



Elytron 5.7 mm. long, 2 mm. broad ; truncate basally, nearly paral- 

 lel-sided except apically, where it is pointed; surface only slightly 

 convex, with eight longitudinal striae, not punctured. 



Type. — University of Colorado Museum 5822: "Eocene, one mile 

 west of Spicer, Arapahoe Pass Eoad, North Park, Colorado, 2| miles 

 south of fork of road; August 2, 1911 (N. E. Hinds)." 



The elytron rather closely resembles Carahites exanimus Scudder, 

 from the bank of White River, Utah, but it is much smaller. 



BALANINUS (7) BEEKLYI, new species. 



Elytron 2.6 mm. long, a little over 1 mm. broad; convex, acutely 

 pointed, with eleven punctured striae. 



riG.3.— Carabites 



ARAPAHOENSIS. 



*Proc. U. S. National Museum, vol. 51, 1916, p. 105, pi. 2, figs. 2 and S. 



