150 NEUROPTERA OF NORTH AMERICA. 



stigma narrow, fuscous ; membratmle white. The adult male has 

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

 cubitals ; nine postcubitals ; four discoidal areolets. 



Length 42 millini. Alar expanse 70 millim. Pterostigma 5 

 millim. 



Hob. 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.'" 

 IJhler. 



LIBELLULA 



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 sinuated; 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. quadrimaculata ! 



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

 Ramb. Selys, Revue des Odonat. 7, 2 (with synonomy). Libellula 

 quadripunctata'Fsib.l Entom. Syst. II, 375, 5. Libellula ternaria Say, 

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



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

 sides of the thorax yellowish, lineated 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 - 3 menibranule 

 white ; sixteen antecubitals ; fourteen postcubitals ; four discoidal 

 areolets. 



Length 48 millim. Alar expanse 80 millim. Pterostigma 4 

 millim. 



