NATURAL SCIENCES OF PHILADELPHIA. 



285 



ones entire, those behind the base interrupted at the inner suture, a few of the 

 middle ones broken ; lines of the corium rather direct, broken, subparallel, 

 oblique line at the membrane yellow, membrane with very serpentine lines, 

 radiating towards the interior margin, which they do not reach ; marginal area 

 yellowish white ; wings milk white ; tergum black, connexivum yellow, with 

 black incisures ; beneath yellowish white, venter dusky at base ; legs yellow- 

 ish white, tip of the basal tarsal joints of the middle feet, black, a broad black 

 band upon the tarsi of the posterior feet, palae cultriform, slightly arcuated at 

 the tip, rather broad, hardly broader in the middle, ciliae moderately long. 

 Female 



Length 7| millims. 



Two specimens were obtained near Chiloweyuck Depot, Washington Terri- 

 tory. The species is remarkable for having very fine scratched, transverse 

 lines bounding some of the lines of the thorax. 



Suborder EOMOPTERA, 



CICADA Linn. 



C. areolata. Black, with a slightly aeneous tinge ; head sordid black, hav- 

 ing a marginal subtriangular, orange spot above the antennae, hypostoma very 

 prominent, rounded, convex, the longitudinal sulcus dilated near its middle, 

 at each end becoming less defined, the transverse elevated lines slender, dis- 

 tant, the intervals fiat, shallow ; face clothed with long white hairs ; rostrum 

 blackish, orange upon the middle ; apical joint of the antennae yellow ; eyes 

 very prominent, pedunculated ; superior aspect of the prothorax transversely 

 quadrate, the posterior angles but slightly produced, the lateral margins ob- 

 tusely angulated in the middle, hardly emarginate before the posterior angles, 

 the posterior margin truncated, orange ; surface rugous, with a longitudinal, 

 slightly impressed orange line upon the middle ; mesothorax black, shining ; 

 elevated posterior margin of the metathorax, including the two posterior 

 branches of the elevated X, orange; hemelytra broad, obtuse, dilated upon the 

 costal margin to the tip of the first marginal areolet, costa and two posterior 

 longitudinal veins at base, yellow, remainder of the veins piceous, veins of 

 the wings yellow, piceous at tip, excepting the middle longitudinal one, which 

 is piceous almost to the base ; tergum black, shining, with scattered white 

 hairs, last segment with a long slender tooth superiorly ; venter sordid black, 

 densely hairy ; lateral pieces of the antepectus orange ; legs orange, the an- 

 terior femora black beneath, armed with two long, rather straight, acute 

 spines ; the knees, a line upon the tibial above, the tarsi, and tips of all the 

 nails piceous ; two foliaceous, rather thick, elongate-oval appendages at the 

 caudal extremity beneath the tooth, the superior one much shorter than the 

 other, and lying applied against it. Female 



The male has no tooth at the caudal extremity, but appendages like those 

 of the female are present ; the penis cover is sub-fusiform, carinated above, 

 and with an interrupted groove exterior to the concave sulcus present upon 

 each side of the middle ; the last ventral segment is extremely elongated, 

 sheath-like, hairy, rufo-piceous ; the drums and sonory apparatus are merely 

 rudimental. 



Length 21 millims. Alar expanse 50 millims. 



Found east of Fort Colville in Washington Territory. This species is very 

 remarkable from the abortive appearance of the drums, and it is highly pro- 

 bable that the species is without a note. In the specimens noticed and cap- 

 tured, no note was observed to be produced. 



PROCONIA Amyot et Serv. 



P. confluens. Blackish, slender ; face white, front rather prominent, 

 convex, two maculose, irregular, longitudinal lines upon the middle, a dot at 



1861.] 



