206 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



introduced from the Indo- Australian region, and, since it appears to 

 be new, I am offering a description. 



The structural diagnoses of the larva and pupa were prepared by 

 Carl Heinrich ; the photographs were made by M. L. Foubert, of the 

 Office of Information, and the drawings by Arthur D. Cushman, of 

 the Bureau of Entomology and Plant Quarantine, all of the United 

 States Department of Agriculture. 



HOMADAULA ALBI7.ZIAE, new species 



Plates 21-25, Figures 1-21 



Antenna, palpus, head, thorax, and forewing and cilia mouse gray 

 with a silvery luster, the scales tipped with pale cinereous. Fore- 

 wing sparsely irrorated with conspicuous black spots. Hind wing 

 fuscous; cilia gray with a light fuscous basal band. Forelegs and 

 midlegs blackish fuscous strongly overlaid with cinereous, tarsi an- 

 nulated with cinereous; hind leg shining luteous, overlaid with 

 gray. Abdomen gray above, luteous beneath. 



Eighth tergite strongly modified to form a close-fitting hood. 

 Distal end broadly bifurcate, each point with a cluster of stiff setae. 

 Eighth sternite greatly reduced, fleshy, ridgelike, and closely in- 

 volved with the vinculum. 



Male genitalia. — Harpe (fig. 16) very slender, with a large sub- 

 quadrate costal expansion, rather profusely covered with fine setae; 

 cucullus narrow, bluntly pointed. Anellus (fig. 13) strongly fused 

 with bases of the harpes, with a small, slender, digitate process from 

 each dorsolateral corner, each process bearing several stout setae at 

 distal end. Aedeagus (figs. 6a, 14) stout, strongly constricted bas- 

 ally, forming a small bulbous process; distal end strongly sclerotized, 

 compressed and curved as a cupped, bifurcate process. Vinculum 

 (fig. 15) a broad U-shaped band. Tegumen with lateral edges 

 broadly expanded, then abruptly narrowed anteriorly. Gnathos (fig. 

 12) arising from the narrow anterior edge of the tegumen in the form 

 of two curved bars, one of these originating slightly to the left of 

 the middle as a narrow, inverted S-shaped bar dilated at the distal 

 end, the other arising from the right side as a broad, inwardly curved 

 bar, its distal end also dilated. Alimentary canal opening distally 

 between these two elements of the gnathos. Uncus (fig. 11) very 

 broad, with a deep excavation on each side of middle distally. 



Female genitalia (fig. 17). — Ostium opening at the end of a long, 

 attenuated, curved tube, the latter emerging from a membranous 

 pocket and curved toward the left. Ductus bursae membranous and 

 entering the duct connecting the bursa copulatrix and receptaculum 

 seminalis well before the bursa. Bursa copulatrix elongate oval; 

 signa 2 lightly sclerotized, elongate plates, situated in the posterior 



