306 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



(7) Pari' of tegmen of unknown Blattoid, costal and anal regiuus 

 and apex missing. Remarkable for the very long simple cells 'n 

 forks of radius and media ; interneural surface finely reticulated. 



(8) Tegmon representing a new species. 



PHTHINOMYLACRIS (?) PAUPER, new species. 



Plate 54, fig. 5. 



Probable length of tegmen (the apical part is missing) about 17.5 

 mm.; apparent width 7.5 mm., but a little of the lower margin is 

 concealed, so that the width was probably fully 8 mm. ; interneural 

 structure a fine reticulation, very distinctly preserved. Subcosta 

 straight, ending about or nearly 10 mm. from base of wing, with 

 four branches arising separately, the two middle ones each forked, 

 the last, with the end of the main stem, enclosing a long cell ; radius 

 gently curved upward beyond the middle, with four branches above, 

 the first forking early, producing a very long cell; the second also 

 forking early, but each division again forked ; the third forking only 

 toward the apex ; the fourth forking before the middle ; media with 

 two long branches, each forked, below and toward the apex two 

 branches above; cubitus with four branches, the first soon forked, 

 the others simple. The anal field is not preserved. 



I have been much puzzled where to place this species. In my key 

 to the Mylacrid genera it runs to Phthinomylacris^ but differs from 

 that genus in the strong interneural reticulation, the narrower tegmen, 

 and the more complicated media. It can be made to run nearly as 

 well to HeTnimylacris^ as typified by H. ramificata Handlirsch, but 

 unfortunately the type of Hemimylacris is H . clintoniana (Scudder), 

 which has Archimylacrid characters and is surely not congeneric. 

 Very probably P. pauper should be regarded as the type of a new 

 genus, but the single specimen is imperfect', and it may suffice to 

 leave it in Phthinomylaeris for the present. It is much smaller than 

 the previously described species of that genus. 



H olotype.— C^t. No. 64347, U.S.N.M. 



(9) Tegmen of a new species. 



ATIMOBLATTA (?) FLEXUOSA. new species. 



Plate 54, fig. 6. 



Probable length of tegmen (the apical part is missing) about '28 

 mm., width 12.5 mm.; anal area 13 mm. long, its greatest' width a 

 little over 6 mm.; interneural structure consisting of very fine close 

 transverse veinlets, which frequently anastomose laterally. Subcosta 

 long, the inclosed region narrow and bandlike, but the subcostal 

 branches can not be made out; radius with four branches above, the 

 first twice forked, the third and fourth once forked (there is doubt- 

 less more complexity, now obliterated) ; media little curved, with 

 three branches above, the first forked a little beyond the level of 



