LIMNOPHILUS. 257 



10. L. externus! 



Limnophilus externus Ilagen! 



Luteous ; head and thorax obscure above, with luteous hair; 

 antennas (base) luteous; feet ochreous, with black spines; apex 

 of the abdomen obscurer ; anterior wings shining, narrow, hardly 

 luteo-pilose, luteous, densely guttated with fuscous, the marks often 

 confluent ; a rhombical spot upon the middle, which is oblique, 

 narrow, hyaline ; the anterior margin immaculate ; at the anasto- 

 mosis are a few spots; veins luteous, the fourth apical areole narrow 

 at base, shorter than the rest; posterior wings luteo-hyaline. 



Female. The four anal appendages almost equal, short, acute ; 

 the valvule short, incised. 



Length to tip of wings 20 millim. Alar expanse 38 millim. 



Hab. K Red River (Kennicott). 



11. L. gravidus ! 



Limnophilus gravidus Hagen ! 



Rufo-fuscous ; antennae (at base) with luteous hair; head and 

 disk of the thorax rufous, with luteous hair, each side with black 

 hair ; abdomen luteous beneath ; feet luteous, with black spines, 

 base of the four anterior tibiae, as well as their middle and apex, 

 and the apex of the posterior tibise, black, apex of the-tarsal arti- 

 cles black ; wings long, broad at the apex, a little rounded, sparingly 

 clothed with white hair ; surface grayish-hyaline, closely pointed 

 with fuscous, points often confluent ; an oblique, discoidal streak, 

 and a semicircle at the apex of the anastomosis, pale hyaline ; veins 

 pale, sparingly interrupted with fuscous ; posterior wings luteo- 

 hyaline, their apex obsoletely spotted with fuscous, and au obscurer 

 spot at the pterostigma. Female. 



Hab. North California. 



12. L. vastus ! 



Limnophilus vastus Hagen! 



Nigro-fuscous; base of antennse fuscous; head and thorax with 

 black hair; mesothorax black, a grayish spot upon the middle, and 

 each side behind marked with a black point ; feet luteous, with 

 black spines; four anterior tibise at base, middle and apex, apex 

 of the posterior tibia?, and apices of the tarsal articles, black ; 

 wings long, broader at the apex, elliptical, grayish-hyaline, almost 

 17 



