NATURAL SCIENCES OP PHILADELPHIA. 87 



Contributions to the Neuropterology of the United States. No. 1. 



BY P. R. UHLER. 



NANNOPHYA Rambur. 



N. be 11 a. Black, pleura and sides marked with yellow; ■wings with a saturate 

 pale-ferruginous spot at base enclosing a number of round dots of a darker 

 color. 



Length I inch. Baltimore. June. 



9 • Trophi blackish, front white with a large black spot upon the middle, 

 vertex blue, eyes brown, antenucO black : thorax black with a j-^ellow vittaupon 

 the pleura becoming posteriorly confluent with patches of the same color, inter- 

 alary surface maculate with yellow : wings hyaline, a broad, saturate yellowish- 

 ferruginous spot at base occupying about one-third of their surface and enclosing 

 a number of small round dots of a deeper color; pterostigma small, black : legs 

 black, spiny : abdomen black ^nnulated with yellow, caudal tip and appendages 

 also yellow. 



This beautiful little species, the second only of the genus yet known, differs 

 a little from the type and must be placed in a division which may be charac- 

 terized by having two ranges of discoidal areolets. It is very rare and the 

 male is yet unknown to me. 



LIBELLULA Lin. 



1. L. b i s t i g m a. Lead-blue ; wings with a ferruginous tint upon the costal 

 margin, stigma brown and white. 



Length 2 inches. Baltimore. June and July. 



% . Body entirely lead blue ; eyes brown, trophi dusky ; frontal and vertical 

 vesicles dark blue, antennae black, stemmata brownish: thorax medially with 

 a deep longitudinal depression, a sharp carina occupying the middle : wings 

 lacteo-hyaline, costal margins slightly tinged with ferruginous, sometimes 

 extending narrowly upon the tips, stigma bicolored, half brown and half white, 

 membranes narrow, whitish : legs black, anterior ones dusky at base : abdomen 

 trigonal, carinate, tapering towards the tip, cerci subfusiform, sub-acute. 



The female of this species I have not yet been able to discover, notwithstand- 

 ing it is here very common ; I was tempted to suppose it to be a geographical 

 variety of the species following: however as I have not yet heard that doctrine 

 fully elucidated it seems hardly prudent for me to venture any further sugges- 

 tions upon the subject. 



2. L. p 1 u m b e a. Lead color ; pleura with two white spots ; wings with a tinge 

 of ferruginous upon the costal margin. 



Length 2 inches. Baltimore. July. 



% . Body plumbeous : labium, base of mandibles, and sides of nasus and 

 front white ; mandibles at tip, labrum, nasus, front and antennae black ; frontal 

 and vertical vesicles dark blue, eyes brown, occiput with two yellow spots be- 

 hind each eye : pleura each with two common white patches, which are divided 

 by black sutures, dorsolum and metapnystega also white, dorsal middle longitu- 

 dinally depressed, but slightly carinated : wings hyaline with a ferruginous 

 tinge upon the costal margin, stigma long, brown : abdomen gradually tapering 

 posteriorly, carinate, iirst and second segments white beneath, caudal segment 

 and appendages black, cerci fusiform, sub-acute. 



$ . Body pale brown ; head, dorsal line, line between the wings, pleural 

 spots, pectus, sides of tergum and femora, testaceous-yellow; eyes brown, an- 

 tennae black : costal margins and tips of the wings ferruginous : abdomen sub- 

 depressed, tergum with a gradually dilating brown line upon the middle, 

 antepenultimate segment broadly dilated. 



3. L. confusa. Fuscous; thorax with two oblique yellow lines upon the 

 pleura, connected with each of which is a pale trigonal spot; wings with a 

 brown basal line, and medial and apical spot. 



Length 1| iuQhes. Baltimore and Boston. 



1857.] 



