NO. 1649. NORTH AMERICAN CRAMBID MOTHS— KEARFOTT. 39 1 



I have another specimen of repanda from Pima County, Arizona, 

 received from Dr. John B. Smith, which is marked and colored exactly 

 like my type, except that the dark shad- 

 ings are a little more intense. These two 

 are so exactly alike in every detail, ex- 

 cept the form of their antenna^ that I 

 am rather inclined to doubt the stability 

 of the latter. Extensive series may show" 

 sufficient intermediate variation to sink 

 the new name as a synonym of repanda. 



THAUMATOPSIS PEXELLA Zeller. FiG. 12.— Head and enlarged an- 



tenna OF THAUMATOPSIS PEX- 



A drawing of the head structure, with 

 an enlargement of the antenna is given in fig. 10 for comparison with 

 similar parts of other species in this genus. 



ANALYTICAL KEY TO SPECIES OF DIATR^A. 



1. Fore wing with a .silver median stripe pantUcht Kearfott. 



Fore \viug witliont silver median stripe 2 



2. Fore wing hhiisli gray, without marks or dots iddlis Fernald. 



Fore wing yellow or brown 3 



3. Fore wing with dorsal white shading aUcni Fernald. 



Fore wing without this distinct shade 4 



4. Fore wing with duplicated subterminal line .^.saccharalli Fabricius. 



Without these lines, expanse over 40 mm diffcrcntiaUs Fernald. 



DIATR.ffi;A PARALLELA, new species. 



Expanse, 22-30 mm. 



Head white, slightly shaded with cream between antenna?; labial 

 palpi white internally, beyond middle dotted with gray, externally 

 heavily dotted with gray and brown; maxillary palpi white, with 

 external patches of gray scales at base of second joint and at outer 

 end of tuft; thorax Avhite, with short indistinct subdorsal ochreous 

 streaks; patagia light fawn, becoming whitish at posterior ends and 

 dorsally edged with white; abdomen And legs cream white, latter 

 slightly shaded with light ochreous. 



Fore wing pale fawn or light ochreous terra-cotta. This ground 

 color is uniform throughout the wing and makes a very effective back- 

 ground for the silver stripes. The median stripe is from base to ter- 

 men, of uniform tliickne.ss except on inner fourth, wdiere it gradually 

 diminishes in width to ba.se ; above it is a ground color stripe of equal 

 width ; above this the costa is narrowly white from base to apex ; 

 veins 2, 3, 4, and 7 are overlaid with white at termen. The dorsal 

 margin is narrowly white and vein I'' is overlaid with white its 



