the; MYCETOPHIIvID.li OF NORTH AMERICA. 267 



cc. Apex of each abdominal segment blackish ; dis- 

 tance from tip of R2+3 to R4+5 over twice as 

 great as from Ri to R2+3 ; wing with two fascia 

 connected with each other along the veins 

 and two smaller spots, 

 d. Thorax not striped. 8. formosa. 



dd. Thorax with stripes. 



8a. formosa, var. indigena n. var. 

 bb. With but a single cloud on apex of wing, no preapical 

 fascia, 

 c. Apex of Ri thickened. 



d. Antennae of male four times, of female at 

 least twice the length of the body, 

 e. Thoracic stripes wanting or but feebly 

 indicated. 9. clara. 



ee. Thoracic stripes brown. 10. concinna. 

 dd. Antennas of female less than one and one- 

 half times the length of the body. II. Sp. 

 cc. Apex of Ri not thickened ; distance from Ri to 

 22+3 about three-fourths as great as from R^-f-s 

 to R4-f-5. 12. gcininata n. sp. 



I. Macroccra diluta Adams. 



1903. diluta, Adams. Kas. Univ. Science Bulletin II. 22. 



Male : Yellow, shining ; antennae, except base, two stripes 

 on occiput, three fascia on mesonotum, the central one joining 

 two narrow ones coming from base of wings, three spots on 

 pleura, lower half of mctanotum, base of abdominal segments 

 from the third, with hypopygium wholly, small spot on base 

 of middle and posterior coxae, tips of femora and tibia?, dark 

 brown ; wings hyaline, fascia near central part dark brown, a 

 small fuscous spot on anterior margin about midway between 

 tip of R24-3 and apex of wing, not reaching the media. 



Female: Agrees with the male, except that'all of the al)dom- 

 inal segments, without the first, have the base dark brown ; the 

 subapical spot of wing is larger, crossing Ml Length 5 mm. ; 

 antenna?, 7 lum. Arizona, August. 



