1913] Banks — Neuropteroid Insects from Brazil 89 



3. A black spot at base of outer side of each antenna; wings whitish. . . .externum. 

 No such spot at base of antenna 4 



4. Wings brownish, often darker on costal part near stigma, third palpal joint not 



twice as long as fourth crassum. 



Wings whitish; palpi more slender, the third joint about twice as long as the 

 fourth columbianum. 



5. Wings white or greenish white albovirens. 



Wings more or less brownish 6 



6. Fifth apical cell of fore wing reaches well on the median cell 8 



Fifth apical cell reaches only to the median cell 7 



7. Discal cell long; dots distinct and black stigmosum. 



Discal cell hardly longer than broad, dots obsolete agraphum. 



8. Discal cell hardly longer than broad, outer side very oblique pallidum. 



Discal cell but little longer than broad, outer side vertical; second palpal joint 



not one and a half times as long as third guatemalum. 



Discal cell nearly twice as long as broad; wings long and slender; second palpal 

 joint more than one and a half times as long as the third furcatum. 



Leptonema guatemalum sp. nov. 



Pale yellowish brown, about as in L. pallidum; antennae plainly annulate with 

 brown; vertex flat, with only short hairs; maxillary palpi slender, the second joint 

 hardly one and a half times as long as the third, which is longer than usual, but not 

 much swollen, the fourth not one-half the length of the third. Wings of moderate 

 length, pale yellowish brown, the costal margin not darker, discal cell longer than 

 in L. pallidum and the outer margin vertical, fifth apical a short distance on median 

 cell, median cell not very broad. Expanse 30 mm. 



From Olas de Moka, Dept. Solola, Guatemala, Sept. (Englehart 

 coll.). 



Explanation of Plate. 

 Figure 1. Leptonema externum wing cells. 



2. Notiopsocus simplex wings. 



3. Spaniophlebia assimilis, genitalia. 



4. Spaniophlebia assimilis, fore wing. 



5. Tricorythus australis, genitalia. 



6. Marilia fasiculata, genitalia. 



7. Campsurus dorsalis, genitalia. 



8. Cy melius minimus, genitalia. 



9. Leptonema guatemalum, wing cells. 



10. Tricorythus australis, genitalia. 



11. Leptonema guatemalum, palpus. 



12. Leptonema externum, palpus. 



13. Campsurus latipennis, genitalia. 



14. Notiopsocus simplex, head. 



