4 PROC. ENT. SOC. WASH., VOL. 24, NO. 1, JAN., 1922 



The most striking and characteristic features of the pupae in 

 this family are : the retention of anal prolegs from the larval 

 stage ; the even flattening of the entire pupa and the laterally 

 swollen abdomen with its bent under appressed terminal 

 segments. 



(Plates 1, 2, 3, Figs. 5, 6, 1 1, 12, 13, 14, 15). Male antennae blackish 

 brown very indistinctly annulated with white and with undersides of first 

 joint white; second joint of labial palpi black with white base; terminal joint white 

 with a few black scales. Face white with black edges towards the eyes. Head 

 white with a small central black dot on vertex. Thorax white with a central 

 longitudinal, black line and two small posterior black dots. Patagia white 

 with black base. Forewings white with a slight roseate tinge and sparsely 

 sprinkled with black scales; from base to just below apex a conspicuous black 

 longitudinal streak, partly interrupted at the end of the cell by a round pure 

 white dot, the black streak narrowly edged below and partially above by a thin 

 more or less interrupted line of bright orange scales; the black scales in the upper 

 part of the wing tend to form longitudinal streaks; a row of ill-defined black 

 dots before the cilia along the terminal edge. Cilia white. Hindwings light 

 fuscous. Abdomen dark fuscous, each joint tipped with white and anal tuft 

 yellowish white. Venation typical of the genus. 



The females are considerably smaller than the males and much darker 

 (Comp. figs. 5 & 6), the forewings more sprinkled with black scaling and the 

 central longitudinal line broader than in the males; hindwings blackish fuscous 

 with light fuscous cilia. Male genitalia (Pis. 2,3, Figs. 11, 12, 13, 14) with 

 uncus broad, hood-shaped, slightly bilobed;soci absent; gnathos a large, strongly 

 chitinized bulging central plate, heavily spined at apex; vinculum simple; 

 annullus large, semi-cylindrical, fused with transtilla and partly fused with 

 harpes, with two large flaring lobes; aedoeagus large with stout, strongly 

 curved "blind sack" below the entrance hole of the penis, mouth bilobed; 

 cornuti consisting of two long slender spines; harpes broadly fused at base with 

 anellus and a broad undifferentiated transtilla; costa separated by distinct 

 sutures from the rest of the harpes; sacculus large, apex sharply pointed, cu- 

 cullus armed with a few long costal spines. 



The female genitalia with strongly chitinized dorsal and genital plates; 

 ductus bursae with a spiraled, strongly chitinized median part; bursaecopulatrix 

 large, oval, with oblong triangular spined signum (Plate 3, Fig. 15). 



Alas expanse males: 26-28mm. 

 females: 22 24mm. 



The male genitalia are typical of the largest group of Ethmia to which tnacel- 

 hosiella belongs (discostrigella Chambers, geranella Busck, umbrimarginella 

 Busck, semitenebrella Dyar, etc.) but are at once differentiated by the acutely 

 pointed apex of the harpes. 



TERMS USED IN FIGURES HEAD OF LARVA (Figs. 1-2). 



Al, A2, A3 .......... anterior group of setae. 



Aa .............. anterior puncture. 



ADFR ........... adfrontal ridge of frons. 



