30 f Jul y. 



ON TWO NEW PAN OR PID J? FROM WESTERN NORTH AMERICA. 



BY R. McLACHLAN, F.R.S., &c. 



The two species described below were lately received in a collection 

 formed by Mr. IT. K. Morrison, of Morganton, North Carolina. 



BlTTACUS CHLOROSTIGMA, 71. Sp. 

 3 . Shining reddish-piceous (the head and thorax reddish-testaceous in less 

 adult individuals) ; apical abdominal segments darker, sometimes nearly blackish. 

 Antennae black, with very short concolorous pubescence ; the first two joints of the 

 ground colour. Rostrum blackish ; the superior dilated portion of the ground 

 colour ; palpi clothed with black hairs. A black spot on the head between the ocelli. 

 Thorax, and base of abdomen beneath, with scattered black spinose hairs, of which 

 three on each side of the front of the pronotum are the most conspicuous. Legs 

 reddish-piceous ; a black ring at the apex of the femora and tibiae ; spinose hairs 

 few, short and black. 



Superior abdominal appendages fully as long as the terminal and penultimate 

 segments together, reddish, but darker (sometimes blackish) at the tips ; irregularly 

 oblong, broad, the superior margin elevated into an angle at the extreme base, but 

 afterwards excised to the apex, which is very obtuse and 

 nearly truncate, the inferior margin gradually rounded 

 and dilated ; exteriorly the edges are thickened, and 

 there is a slight keel from base to apex parallel with the 

 upper edge ; interiorly the appendages are concave, the 

 edges equally thickened, and there is a broad triangular 

 inner tooth above the most dilated portion of the lower edge. Penis reddish- 

 testaceous, recurved in a nearly semicircular manner, flattened, with a median 

 longitudinal sulcus. Internally, between the superior appendages, is a short straight 

 hairy process, gradually dilated to the very obliquely truncate apex. On each side, 

 immediately above the inferior appendage, is a short, straight, cylindrical, hairy 

 (apparently non-articulate) process. 



Wings long and very narrow, scarcely dilated : vitreous (possibly with the 

 slightest tinge in very adult individuals). Pterostigma large, conspicuously greenish- 

 yellow. Neuration black (excepting the pterostigmatic vein and its two nervules) ; 

 apical transverse nervules few. 

 $ unknown. 



Length of body, 25 — 26 mm. Expanse, 51—57 mm. Length of anterior wing, 

 25 — 28 mm. Greatest breadth of anterior wing, 4 — 4^ mm. Length of superior 

 appendages, 2| mm. 



South California. I have examined eight $ . 



This species, which is conspicuous by its pale greenish-yellow 

 pterostigma, has the greatest expanse of wing of all the known North 

 American forms ; at the same time the wings are remarkably narrow, 

 and in this differ from all species from the Eastern States. It is a fine 

 addition to the N. American fauna. 



The figure represents a side view of the end of the abdomen (with 

 the appendages) of the ^ in outline. 



