NEW SPECIES OF NOETH AMERICAN FOSSIL BEETLES, 

 COCKROACHES, AND TSETSE FLIES. 



By T. D. A. COCKERELL, 



Of the University of Colorado, Boulder. 



The following notes upon new American fossil insects are the 

 result of studies upon several small lots of specimens submitted to me 

 by the United States Geological Survey. All of these specimens have 

 been transferred to the United States National Museum and the 

 catalogue numbers of the types will be found given under the de- 

 scriptions of these species. For convenience of reference the paper 

 has been divided into three headings, as noted below. 



1. FOSSIL COCKROACHES^FROM THE PENNSYLVANIAN. 



The insects described below were collected for the United States 

 Geological Survey by Dr. Harvey Bassler, of the Maryland Geo- 

 logical Survey, during 1916. Two localities are represented, and the 

 material adds considerably to our knowledge of the subject. 



(A) Rock quarry one mile northeast of Mercer Court House, 

 Pennsylvania, above State hospital. (Bassler.) The horizon is 10' 

 below top of Conoquenessing. 



(1) Blattoid pronotum, slightly over 13 mm. broad and about 10.8 

 long; the posterior portion shows transverse striae, as in the living 

 Archifnandrita marmorata Stoll, from Guatemala. Such striae have 

 also been observed in a pronotum obtained by Schlechtendal in the 

 Upper Carboniferous of Saxony. 



(2) Blattoid tegmen, with the following characters: 



ATIMOBLATTA REDUCTA, new species. 



Tegmen about 32 mm. long and 13 broad; interneural structure 

 obscure, appearing rugose, but in the cubital field it can be seen that 

 it consists of cross-veins, variably united by transverse veins in the 

 middle, producing a reticulation of the same general character as that 



Proceedings U. S. National Musuem' Vol. 54— No. 2337. 



301 



