164 NEUROPTERA OF NORTH AMERICA. 



4. D. mendax ! 

 Dythemis mendax Hagen ! 



Blackish-fuscous ; mouth and front pale yellow; thorax fuscous, 

 dorsum each side with a fascia, which is broader at the wings, an- 

 gulose, greenish-white ; sides greenish-white, with two oblique, 

 approximate, fuscous stripes ; feet black ; the anterior femora pale 

 beneath, abdomen slender, a little longer than the wings, the base 

 compressed, more inflated, the apex stouter ; brownish-black, seg- 

 ments 1 7 with a double spot each side upon the dorsum, green- 

 ish-white, upon segments 4 6 it is almost linear, upon segment 7 

 posteriorly, a large dilated spot, the sides and venter spotted with 

 greenish- white ; appendages black ; wings hyaline, the posterior 

 ones fulvous at the extreme base ; pterostigma small, black ; mem- 

 branule black ; twelve antecubitals ; eight postcubitals ; two dis- 

 coidal areolets. 



Length 55 60 millim. Alar expanse 76 86 millim. Ptero- 

 stigma 3 to 3^ millim. 



Hob. Pecos River, Western Texas (Capt. Pope). 



I saw a female from Tampico (Saussure) which had the head 

 chalybeous above : is it different ? 



5. D. praecox! 



Dythemis praecox Hagen! 



Fuscous; mouth pale, the front fusco-aeneous above; dorsum 

 of the thorax fuscous, a green stripe each side, which is broader 

 at the wings, angulose ; the sides fuscous, three stripes, the middle 

 one interrupted, green ; feet black, the femora luteous in part ; 

 abdomen slender, a little longer than the wings, the base com- 

 pressed, more inflated, the apex thicker; fuscous, dorsum each 

 side upon segments 1 7, with a double, yellowish spot; upon 

 segments 4 6 the spots almost linear ; upon segment seven a 

 larger, broader spot posteriorly ; appendages black ; wings fusco- 

 fumose, fulvous at base; pterostigma small, black; membranule 

 black. Female. 



Twelve antecubitals; seven postcubitals; two discoidal areolets. 



Length 48 millim. Alar expanse 70 millim. Pterostigma 2 

 millim. 



Hub. Mexico (Collection of Hagen). 



