ART. 19. MOTHS OF THE GENUS DIATEAEA DYAR AND HEINRICH 7 



sacculi of harpes; never hinged to vinculum or rigidly attached to 

 harpes. 



Female genitalia with ductus bur.sae very short, chitinized. Bursa 

 copulatrix large; chitinized at juncture with ductus (heavily so in 

 a few species), the chitizination covering upper half of bursa in 

 strigipennella Dyar and the oriental venosata Walker ; in the former 

 there is also an internal median girdle of serrate chitinous ridges 

 (fig. 23) ; without signum. Ovipositor and supporting rods normal. 



Abdomen of male with or without a pair of lateral hair tufts (X, 

 fig. 1) on caudal margin of second segment. 



Genotype. — Phalaena saccliarcblis Fabricius. 



KBT TO THE SPECIES OF DIATRAEA ON COLORATION AND STRUCTURE OF THEI FRONT 



1. Fore wing straw-colored or brownish with two oblique lines, more dis- 



tinct in the male than the female; veins not lined 2 



Fore wing straw-colored, brownish, or gray ; veins conspicuously lined ; 



cross marks absent or subordinated 15 



2. Oblique lines dotted, subparallel 3 



Oblique lines shaded or obscurely rounded and confluent costally 12 



3. Front without a tubercle 4 



Front with a tubercle 8 



4. Large ; light straw-colored ; dots of lines distinctly separated. 



instructella Dyar (p. 10) 

 Smaller; brownish straw-colored ; dots of lines not distinctly separated-- 5 



5. Hind wing nearly white 6 



Hind wing fuscous brown shaded with traces of outer line 7 



6. Male without hair tufts on the tibiae saccharalis (Fabricius) (p. 11) 



Male with hair tufts on hind [pedibarbata Dyar (p. 12) 



tibiae [? incomparella Dyar and Heinrich (p. 13) 



7. Hind wing paler than fore wing zeacolella Dyar (p. 19) 



Hind wing as dark as fore wing postlineella Schaus (p. 20) 



8. Fore wing gray-brown, reddish suffused 9 



Fore wing yellow-brown 10 



9. Wing broad, marks distinct ; inner line less distinct than outer. 



canella Hampson (p. 20) 



,^,. ,11 1 famnemonella Dyar (p. 21) 



Wing narrow; marks blurred <^ ^ . ^ , V, . . , , „„, 



[castrensis Dyar and Hemnch (p. 28) 



10. Large ; male 30-33 mm. ; hind wing darker than fore wing. 



magnifactella Dyar (p. 14) 

 Smaller ; male 17-28 mm. ; hind wing paler than fore wing 11 



11. Male with inner line blotched below end of cell- guatemalella Schaus (p. 14) 

 Male with inner line not so blotched tabernella Dyar (p. 15) 



12. Front without a tubercle 13 



Front with a tubercle , 14 



13. Large; female 29 mm centinens Dyar (p. 15) 



Smaller; female 16-18 mm gaga Dyar (p. 18) 



14. Outer line denticulate, leaving clear yellow area at tornus. 



maronialis Schaus (p. 23) 

 Outer line shaded; no discolorous tornal area umbrialis Schaus (p. 23) 



15. Fi'ont without a tubercle 16 



Front with a tubercle 18 



16. Ground color whitish ; veins strongly contrasted 17 



Ground color brown; veins not strongly contrasted- evanescens Dyar (p. 18) 



