Shield somewhat reduced. 



10 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.71 



6. Bursa uarrow, greatly elongated magnifactella Dyar (p. 14) 



Bursa broad, at least one-half times as broad as long 7 



7. Bursa with a strongly chitinized ring in neck. 



indigenella Dyar and Heinrich (p. 13) 

 Bursa without such 8 



8. Shield projecting below genital opening, large. 



busckella Dyar and Heinrich (p. 16) 

 'continens Dyar (p. 15) 

 instructella Dyar (p, 10) 

 Imoorella Dyar and Heinrich (p. 17) 

 pedibarbata Dyar (p. 12) 



9. Genital opening with a slight scalloped ridge beneath ; ductus ex- 



tremely short (neck of bursa closely approximate to genital opening) _ 10 

 Genital opening with a semitubular shield formed by external pro- 

 duction of diictus ; ductus longer (neck of bursa appreciably sepa- 

 rated from genital opening) . 11 



10. Chitinlzation back of genital opening extending to eighth segment collar. 



grandiosella Dyar (p. 25) 

 Chitinlzation back of genital opening not extending to eighth segment collar. 



[lineolata (Walker) (p. 24) 

 [ muellerella Dyar and Heinrich (p. 25) 



11. Chitinization back of genital opening smooth ; ductus narrow through- 



out length cayennella Dyar and Heinrich (p. 27) 



Chitinization back of genital opening corrugated ; ductus greatly broad- 

 ened toward bursa bellifactella Dyar (p. 26) 



12. Genital opening with a thin broken ring about its mouth or with 



lateral edges of mouth slightly raised and chitinized 13 



Genital opening simple 14 



^„ „ ,, , ^ -, fmaronialis Schaus (p. 23) 



13. Bursa greatly elongated, narrow { , . ■,. o, i. / ^on 



[umbrialis Schaus (p. 23) 



■„ i. ^,1 X J I, Jcanella Hampson (p. 20) 



Bursa not greatly elongated, broad ^.v, • , -.^ , tt • • i / o-i n 



[anathericola Dyar and Hemrich (p. 21) 



14. Ductus strongly chitinized 15 



Ductus weakly chitinized 16 



15. Bursa with slight signum amnemonella Dyar (p. 21) 



Bursa without signum fuscella Schaus (p. 22) 



-lo A 1- vi T.^- . 4.. . , -c u fevanescens Dyar (p. 18) 



16. A very slight chitinization m neck of bursa <^ ^ , ^^.^ 



[gaga Dyar (p. 18) 



A strongly chitinized plate or collar in neck of bursa 17 



17. Collar in neck of bursa partially scobinate zeacolella Dj^ar (p. 19) 



Collar in neck of bursa entirely smooth venosalis (Dyar) (p. 22) 



DIATRAEA INSTRUCTELLA Dyar 



Figure 49 



Diatraea instructella Dyar, Ent. News, vol. 22, 1911, p. 201. 



A large species. The fore wing light yellowish straw ; cross lines 

 well contrasted, the outer dotted, the inner continuous and irregularly 

 wavy; discal dot distinct. The front is but gently convex, without 

 tubercle. 



Expa/nse. — Female, 44 mm. 



