150 NEUROPTERA OP NORTH AMERICA. 



stigma narrow, fuscous ; membranule white. The adult mqle has 

 the bands of the wings joined together with fulvous ; twelve ante- 

 cubitals ; nine postcubitals ; four discoidal areolets. 



Length 42 millim. Alar expanse TO millim. Pterostigma 5 

 millim. 



Hah. Pecos River, "Western Texas (Capt. Pope). 



"An adult male, in my collection (from the same locality), has 

 the thoracic stripes wanting, and with merely yellowish spots at 

 the origin of the anterior legs ; the labium has a large, square, 

 blue-black, middle band, and the labrum is entirely black, the 

 upper part of the front is blackish. A similar, mutilated male, is 

 in the Smithsonian Collection, labelled 'San Diego trip.'" — 

 Uhler. 



LIBELLULA Linn£. 



Eyes connected in a short space ; posterior lobe of the pro- 

 thorax small, entire ; abdomen stout, rotundo-triquetral, sensibly 

 narrowing posteriorly; feet long, stout; pterostigma oblong, large ; 

 the first sector of the triangle sinirated; triangle narrow, long ; 

 appendages short; genital organs of the male hardly prominent; 

 vulva disclosed, the segment following it carinated in the middle 

 and bituberculated. 



1. L. quadriinaculata I 



Libellula quadrimaculata Linue ! Syst. Nat. ed. XII, 901, 1. Fab. Burm. 

 Rarnb. Selys, Revue des Odouat. 7, 2 (with synouomy). — Libellula 

 quadi-ipunctata Fab.! Eutom. Syst. II, 375, 5. — Libellula ternuria Say, 

 % Jour. Acad. Philad. VIII, 21, 7. 



Reddish-yellow, villose; front pale, above terminated with black; 

 sides of the thorax yellowish, liueated with black ; feet black ; ab- 

 domen attenuated at the apex, fuscous behind, the sides yellow ; 

 superior appendages of the male black, very long; wings at base 

 anteriorly, yellow, a costal spot and sometimes an apical, one, the 

 posterior wings with a triangular spot at base, reddish-black, 

 veined with yellow ; pterostigma brownish-black ; membranule 

 vrhite ; sixteen antecubitals ; fourteen postcubitals ; four discoidal 

 areolets. 



Length 48 millim. Alar expanse 80 millim. Pterostigma 4 

 millim. 



