224 NEUROPTERA OF NORTH AMERICA. 



base of the antennae beneath yellowish; antenna? lurid,. annul ated 

 with fuscous; vertex varied with fulvous and fuscous, a middle lon- 

 gitudinal line, and each side with a transverse streak, fulvous; 

 occiput with two approximated fuscous lines; prothorax lurid, each 

 side with three longitudinal fuscous stripes, the intermediate ones 

 being less clear; the middle ones approximated, with a whitish line, 

 which is thicker anteriorly, separating them; thorax lurid, streaked 

 with fuscous, and with a dorsal whitish, middle line; feet pale, apex 

 of the femora exteriorly fuscous, tibiae, especially the anterior ones, 

 annulated with fuscous ; nails black ; abdomen lurid, above with 

 three fuscous streaks ; thorax and feet with long and dense gray 

 villosity ; appendages of the male cylindrical, short, almost straight, 

 above with black pile ; wings long, narrow, the apex acuminated, 

 the apex of the posterior ones a little emarginated, hyaline, with 

 pearly spots ; veins alternated with white and fuscous spots ; radius 

 punctated ; the space between the median nervure and the subcosta 

 sometimes spotted with fuscous ; pterostigma small, white ; trans- 

 verse veins often bifid at the apex of the costal space. 



Length to tip of wings 70 millim. Alar expanse 120 millim. 



Hab. Mexico (Coffin); Cuba; Columbia; Guiana; Brazil. 



It may perhaps constitute a new subgenus. 



3. A. congener! 



Acanthaclisis congener Hagen! 



Black, clothed with gray hair; face, palpi, and base of the an- 

 tenna? beneath, yellowish-white ; antenna? black, the apex with nar- 

 row whitish rings ; vertex black with two transverse stripes, the 

 posterior one interrupted in the middle, and two points posterior 

 to the bands, yellow, the surface with white hair ; prothorax each 

 side with a maculose stripe, which is double anteriorly, fulvous ; 

 posterior margin fulvous, black in the middle; mesothorax spotted 

 with yellow; abdomen black, with gray pile, the posterior margins 

 of the apical segments narrowly fulvous ; feet fuscous, with gray 

 hair, tibiae yellowish, annulated with fuscous, tarsi black ; wings 

 hyaline, a little acuminate, veins yellow, with fuscous interruptions, 

 pterostigma small, black, margined with yellow; subcosta and me- 

 dian nervule distinctly punctate ; the costal space with one series 

 of areoles. (Female.) 



Length 'to tip of wings 43 millim. Alar expanse 72 millim. 



Hab. Pecos River, Western Texas, July (Capt. Pope). 



