760 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



plainly belongs to the true Falgorlna, and seems to agree better with 

 Aphana than with any other genus concerning which information is at 

 hand, but it is much smaller than the species of Aphana (as it Is larger 

 than those of Pceoeera), and differs from it in the structure of the head 

 and the brevity of the tegmina. The head is small, being scarcely more 

 than one-third the width of the body, the eyes not prominent, the front 

 scarcely angulated, and the vertex of about equal length and breadth; 

 it is marked above with two longitudinal blackish stripes, and the thorax 

 with a median, and, on either side, a broad lateral black stripe, all of 

 them bordered by paler parts and the median marked with a median 

 pale line. The front of the thorax is strongly and regularly convex, and 

 the posterior border of the mesonotum is rectangular. The tegmina are 

 about three times as long as broad, with nearly parallel borders, the tip 

 roundly pointed. The apical fifth is filled with fine, closely parallel, longi- 

 tudinal veinlets, extending from th<'. tip of the radial vein to the inner 

 border, forming an area of equal width throughout. The radial vein 

 is parallel to the costa throughout. The ulnar veins originate almost 

 exactly as in AcrcepMa, but the upper one does not fork before the mid- 

 dle of the wing, when it sends downward a single shoot, while the lower 

 forts almost immediately, and again emits a vein beyond the middle 

 of the wing. The wing itself is apparently diaphanous, but is mottled 

 lightly with faint fuliginous along the costal border, and more heavily, 

 but irregularly, with dark fuscous on the basal half of the wing, espe- 

 cially next the extreme base, aud in a rather broad and straight but 

 irregularly margined and oblique band, crossing the wing from just 

 below the sutural angte equally backward and outward. Middle leg 

 moderately stout; femur and tibia of equal width, straight, apparently 

 with sharp edges. Abdomen full, rounded, broad, the extremity broadly 

 rounded ; it is dusky, especially beyond the base, the neighborhood of 

 the spiracles darker, the fifth to the seventh segments with a medio- 

 dorsal (or medio-ventral?) raised line marked in black. Length of body 

 9.5™"^ ; breadth of head l.S"''^; of abdomen 5°"^; length of tegmina 10"°'"; 

 width of same 3.5™™; length of femora (somewhat doubtful) 2™"^. 

 Chagrin Valley. 



Delphax senilis. — A fairly preserved specimen with spread wings, but 

 with almost no characteristic sculpture. The head and exposed part of 

 thorax are blackish ; the rest of the body and the wings, especially the 

 tegmina, dusky. The head is less than half as broad as the thorax, and 

 short. The thorax is broad and rounded, and the body nearly equal, 

 though enlarging slightly posteriorly. The tegmina are slightly nar- 

 rower and considerably longer than the body, equal, and at the tip 

 broadly rounded ; they show no trace of neuratiou, but the preservation 

 of the whole is perhaps too obscure to expect it. The wings are a little 

 shorter than the tegmina, crumpled aud folded, and show a few longi- 

 tudinal veins, and others, which, from the nature of the preservation, 

 cannot be traced. Legs and appendages of the head are wanting. 

 Length of body 2^™ ; tegmina 2.4'"'". Chagrin Valley (?). 



