304 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



COBALOBLATTA SIMULANS, new species. 



Plate 54, figs. 1, 2. 



Tegmina about M mm. long, 18 wide; anal field about 15.5 mm. 

 long; end of subcosta about 28 mm. from base of wing. 



There are two specimens, each with reverse. 



This fine insect is close to Pachyhlatta Cockerell, from the Mount 

 Savage clay, but it is much larger ; ^ the costa presents a regular curve, 

 the branching of the subcosta is much more simple (in the basal 

 part of the costal area there is merely a vague reticulation), and the 

 media is less complicated. In my tables it runs near Kinklidohlatta, 

 from Pittston, Pennsylvania, but it is very much larger, with the 

 cubitus entirely different. The cubitus is suggestive of Olethrohlatta^ 

 from Germany, but the subcosta is quite unlike that genus. Superfi- 

 cially the species looks like Phoherohlatta reticulata from the same 

 locality, but it shows many differences in detail. 



n olotype.— C2it. No. 64344, U.S.N.M. 



(3) Tegmen lacking apex. 



BRACHYMYLACRIS BASSLERI, new species. 



Plate 54, fig. 3. 



Probable length of tegmen 14.5 mm., width about 8 mm. ; length of 

 anal area 8 mm. ; end of subcosta from base of wing 8 mm. ; interneural 

 structure consisting of very fine cross- veins, which occasionally unite 

 laterally. Subcosta with four branches above, the second with two 

 branchlets above; radius early dividing into an upper and a lower 

 part, the upper with three branches, the first of which again divides 

 near its origin ; lower division of radius forking, each division again 

 forking, the upper branchlet of the lower division forking (there 

 may be more complexity, the apex of the wing being missing) ; 

 media dividing early, each division with two branches below ; cubitus 

 very simple, with only one main branch, which soon divides, and 

 each division again forks, the fork of the upper division very long, 

 that of the lower very short; anal area with 13 veins on margin, 

 these forming two groups, that of the first four (counting back- 

 ward or from above) and that of the others, separated by a wide 

 interval basally; in the lower division of the anal veins are three 

 forks. 



Allied to B. cordata Handlirsch, but differing in the more simple 

 cubitus and other details. B. cordata is from Tremont, Pennsyl- 

 vania (Anthracite series). 



Holotype.—C2it. No. 64345, U. S.N.M. 



(4) Tegmen representing a new genus. 



^PachyVlatta oonvexa Cockerell has the tegmen 30.5 mm. long, the subcosta ending 23 

 mm. from base of tegmen and 7.5 mm. from level of apex. 



