MEXICAN NEUROPTERA. 369 



Lieptocella gracilis n. sji. — Head yellowish, clothed above with long 

 white hair; apical part of autennpe blackish, basal part yellowish, the joints 

 broadly annulate with brown ; thorax yellowish, with white hair, abdomen yel- 

 lowish on base, beyond greenish; legs yellowish, clothed with white scales; 

 wings hyaline, veins yellowish, membrane clothed with yellowish white hairs, 

 more brownish patches scattered along on the veins, the apical fringe yellowish 

 brown, on apical margin on anterior part are two black dots; hind wings hyaline, 

 veins white, fringe gray; structure similar to the other white species. Length 

 9.5 mm. 



One male from Cuernavaca, Morelos, June. 



Heteropiectroii niexicanuni Banks. 



Two specimens from Cuernavaca, June. It has somewhat the 

 appearance of certain sawflies. 



Heteropiectroii iiigripenniM Banks. 



Several specimens from Santa Maria, Pueblo, May ; and Cuerna- 

 vaca, June. Smaller than the preceding, but closely related to it. 



Heteropiectroii niaculatuni n. sp.— Head reddish yellow, vertex- 

 dark brown, antennte reddish yellowish, dorsum of rest of thorax dark brown ; 

 abdomen dull yellowish on base, brown beyond; legs yellowish, the tibiae and 

 tarsi, except the basal joint of anterior and middle pairs, thickly clothed with 

 black hair, spurs blackish; wings black, with black hair, some yellowish hair 

 near base, before the middle a narrow, curved transverse band of white hair, not 

 attaining the anterior margin ; at end of cell is another shorter, nearly straight 

 white band, not reaching either margin ; hind wings shining black. Structure 

 similar to H. mexicannm. Length 14 mm. 



One specimen from Presidio, Vera Cruz, June. 



The three species of Heteroplectron may be tabulated as follow.* : 



1. Wings banded with pale, femora mostly yellow tnaculatiiiii. 



Wings unmarked, femora mostly black 2. 



2. Head mostly yellowish above iiigripenni!^. 



Head black above iiiexicaiiuiii. 



HYDROPSYCHID^. 



Hydropsyclie niexicaiia n. sp.— Head clothed with black hair, some 

 golden hair at base of antennae; latter yellowish, with indistinct spiral lines; 

 thorax black, with short black hair; abdomen brown ; legs pale dull yellowish • 

 spurs same color; wings dark, irrorate with yellow, margins interruptedly yel- 

 low and black, on the costal margin black patches are quite long, much shorter 

 on apical margins, where the black is at the ends of veins and the yellow between 

 them ; fringe dark gray ; hind wings gray, fringe darker gray. Antennae about 

 equal to length of wings. Length 11.5 mm. 



One specimen from Tacubaya, D. F., May. 



TEANS. AM. ENT. SOC, XXVII. (47) DEC, 1901. 



