HEMIPTERA— HETEROPTERA— LYGJ^ID^. 383 



the same time taper rapidly ; the surface smooth. The hemelytra are light 

 colored, excepting for an equal, not very broad, costal-thickening of a tes- 

 taceous color, which appears to be characteristic. The abdomen seems to 

 be ordinarily fuller in the apical half than in P. communis. 



Length, 3.4""'; breadth, 1.5"""'; length of corium, 1.75°"°. 



Florissant. Five specimens, Nos. 5952, 6367, 6394, 7062, 9937. 



3. Procrophius languens. 

 PI. 23, Fig. 23. 



A single specimen has been separated from the others on account of 

 certain characteristics which appear to be peculiar ; unfortunately the 

 appendages of the head are not preserved, but the head itself appears to be 

 longer and more produced than in either of the other species, and the tho- 

 rax of the same form as in P. communis, .tapering as rapidly and with rec- 

 tilinear sides, but it is perhaps a little shorter than in P. communis and its 

 surface a little less smooth. The hemelytra are clear throughout, and 

 show lines of punctures along the course of the principal veins which can 

 not be made out in either of the other species. The abdomen has the form 

 of that of P. costalis. 



Length, 3.4'""'; breadth, L5°"" ; length of corium, 1.5'°'°. 



Florissant. One specimen. No. 6239. 



Subfamily. MYOOOCHINA StaL 



As has been stated above, the vast majority of the American fossil 

 Lygreidaj belong to the present group. A remarkable feature to be noticed 

 in them — not embracing all the species, but certainly most of them — is the 

 brevity of the antenna?, rarely half as long at the body, and usually much 

 shorter than that. They are extraordinary, too, for the very large propor- 

 tion which can not be referred to existing genera, and for their general 

 resemblance as a whole to subtropical types. The members of the first 

 group, the Myodocharia, seem to form, with few exceptions, a type apart, 

 in which the posterior lobe of the thorax does not broaden from behind for- 

 ward, being as a whole narrower, or at least no broader, than the anterior 

 lobe when the latter has ampliated sides, the opposite being ordinarily the 

 ease in modern types. With a single exception or two they all come from 

 Florissant. 



