636 PROCEEDINGS OF THE ACADEMY OF [DeC, 



ORTHOPTERA. 



Amblycorypha (?) perdita n- sp. (Locustidse). 



Tegmen 30.5 mm. long, 12 mm. broad, the broadest part about 

 11 mm. from the very broadly rounded and obtuse apex; costal 

 region not enlarged, the subcostal nervure about equally distant 



from costa and stem of 

 radius until 5 or 6 mm. 

 from base, where it is nearer 

 costa than radius, and so 

 continues; radius straight, 

 the radial sector coming off 

 at a rather wide angle near 

 Amblycorypha (?) perdita. the middle of the tegmen; 



apical field irregularly retic- 

 ulated throughout. The lower margin of the tegmen can be dis- 

 tinctly followed to near the base, and there appears to be no anal 

 lobe, but it seems exceedingly probable that this is illusory, the 

 apparent margin near the base being the sharp line of demarcation 

 found in the modern species, limiting the anal area above. 



Miocene shales of Florissant, Wilson Ranch (Wickham). I have 

 wondered whether this could be Scudder's Orchelimum placidum, 

 but it is certainly not an Orchelimum, and beyond a general similarity, 

 there is nothing definite to indicate its identity with Scudder's species. 

 It is provisionally placed in Amblycorypha, to which it is presumably 

 allied, and from which, without better preserved materials, it does 

 not seem worth while to separate it. Mr. J. A. G. Rehn kindly 

 examined my sketch of the venation, and reported that it was not 

 quite like any modern genus; as he observed, if the anal area is truly 

 absent, the tegmen is quite peculiar; but if it is present, the insect 

 is not very remarkable. Except for the shape of the tegmen, there 

 is a rather close resemblance in structure to Pycnophlebia speciosa 

 (Germar) from the lithographic stone of Solenhofen. 



HEMIPTERA. 



PSYLLITES n. gen. (Psyllida;). 



The distinctive characters are in the venation, as follows: 



(1) The radius leaves the radial sector a little before the middle 

 of the wing, and passes obliquely to the costa, where it ends, as in 

 Psylla astigmata. 



(2) The stem of the radius is in a straight line with the radial 



