HEMIPTERA— HOMOPTEKA— JASSIUES. 305 



Bythoscopus lapidescens. 



PI . 5, Fig. 94. 



Butkoscopiis lapidescens Soudd., Bull. U. S. Geol. Geogr. Surv. Terr., Ill, 761 (1877). 



A single specimen, broken at the edge of a stone, and so preserving 

 only the abdomen and part of the wings. The abdomen is long and slen- 

 der, composed of nine segments, the extremity indicating that it is a female. 

 The wing (the tegmina appear to be entirely absent) reaches the tip of the 

 abdomen, and the apical cells are from a third to nearly half as long as the 

 wing, the upper the longer ; the apex is produced but rounded. 



Probable length of body, 5.5-""; length of fragment, S.S""-"; breadth 

 of abdomen, LS"""". 



Chagrin Valley, White River, Colorado. One specimen, No. 44^ W. 

 Denton. 



AGALLIA Curtis. 



To this srenus, now found in both worlds, and never before found fos- 

 sil, I refer several of Florissant species with little doubt, except that most of 

 them are of too large size. 



Table of the species of Agallia. 



Large species (body exceeding eight millimeters iu length) ; a cross-vein uniting the radial vein to the 

 margin in the outer half of the wing. 

 Tegmina more than three times as long as broad. 



Apical cells of tegmina twice as long as broad 1. A. lewisii. 



Apical cells of tegmina only half as long again as broad 2. A. flacdda. 



Tegmina less than three times as long as broad 3. A. instabilis. 



Small species (body less than five millimeters in length) ; no cross-vein uniting the radial vein to the 

 margin 4. A. abatructa. 



1. Agallia lewisii. 



PI. 19, Figs. 7, 21. 



Head relatively small, narr-ower than the thorax by reason of the for- 

 ward narrowing of the latter, broadly rounded. The thorax is veiy finely 

 wrinkled transversely. The tegmina are fully three times as long as broad, 

 the costal margin broadly and pretty regularly convex but more rounded 

 at the extremities than in the middle ; the ulnar vein forks (and is united to 

 the radial) at the end of the proximal third of the wing, and the latter runs 

 into the costal margin a little before the tip, sending a cross-vein to the 

 margin at about the middle of the apical half of the wing, opposite which a 



VOL XIII 20 



