AMERICAN MOTHS OF THE SUBFAMILY PHYCITINAE 



177 



366. Ulophora guarinella (Zeller) 

 Figures 421, 909 



Myelois guarinella Zeller, Horae Soc. Ent. Rossicae, vol. 16, p. 



208, 1881. 

 Ulophora guarinella (Zeller) Ragonot, Monograph, pt. 1, p. 155, 



1893. 

 Acromeseres dialithus Dyar, Ins. Insc. Menstr., vol. 7, p. 42, 1919. 



(New synonymy.) 



Forewing decidedly paler than that of groteii and, 

 except for the band preceding the antemedial line, an 

 almost uniform pale gray; the transverse lines obscure; 

 antemedial line bordered inwardly by an orange-red 

 band with more or less black shading on its lower half 

 and a black scale ridge along its inner edge ; subterminal 

 line nearly obsolete, indicated chiefly by a very faint, 

 narrow, dark gray inner border ; discal dots more or less 

 obscured, when distinguishable, blacldsh and either 

 separated or coalesced; terminal dots faint, separated. 

 Hind wing whitish with a faint brownish or smoky tint 

 towards apex and along outer margin; the veins very 

 slightly darkened. Alar expanse, 13-18 mm. 



Male genitalia are similar to those of groteii except 

 for narrower harpes and a more bluntly pointed uncus. 

 The female genitalia show no distinguishing characters. 



Type localities: Honda, Colombia {guarinella, in 

 BM); Santiago, Cuba {dialithus, in USNM). 



Food plant: Unknown. 



Distribution: Cuba: Santiago (Jan., Oct.), Baracoa. 

 Colombia: Honda. 



In structure, color, and maculation Dyar's dialithus 

 is a perfect match to the male type of guarinella. The 

 species is very close to groteii but apparently distinct. 

 Nothing is known of its life history. 



Genus 89: Chorrera 



[Venational division B. Forewing smooth; veins 3, 4 and 5 equi- 

 distant and approximate towards base. Hind wing with vein 2 

 well before angle; 4 and 5 stalked for over half their lengths. 

 Male genitalia with transtilla incomplete; aedeagus needlelike; 

 penis unarmed; vinculum with pair of anteriorally produced 

 lateral lobes from terminal margin. Female genitalia developed 

 as two elongate, narrow, opposed plates, armed with short, longi- 

 tudinally arranged spines; ductus bursae slender, globularly ex- 

 panded near genital opening.] 



89. Genus Chorrera Dyar 



Chorrera Dyar, Proc. U. S. Nat. Mus., vol. 47, p. 330, 1914. 

 (Type of genus: Chorrera idiotes Dyar.) 



Tongue well developed. Antenna weakly pubescent; 

 on male a slight scale tuft on shaft shortly beyond basal 

 segment, no appreciable sinus. Labial palpus obliquely 

 ascending, reaching to slightly above vertex, slender; 

 second segment roughly scaled; third less than one-half 

 the length of second, acuminate. Maxillary palpus 

 squamous. Forewing smooth; 11 veins; vein 2 from 

 before but lather near lower outer angle of cell; 3 from 

 the angle; 3, 4 and 5 equidistant and approximate 

 towards base; 6 from below upper angle of cell, straight ; 



8 and 9 stalked for half or less than half their length; 

 10 from the cell; male without costal fold. Hind wing 

 with vein 2 from well before outer angle of cell; 3 from 

 the angle; 4 and 5 stalked for over half their lengths 

 (very long stalked in extrincica) ; 7 and 8 closely approxi- 

 mate for a short distance beyond cell ; cell less than one- 

 half the length of wing; discocellular vein curved, con- 

 siderably produced at lower angle. Eighth abdominal 

 segment of male with a pair of very weak ventrolateral 

 hair tufts. 



Alale genitalia with uncus rather narrowly triangu- 

 late, tapering abruptly at apex. Apical process of 

 gnathos a short, stout hook. Transtilla incomplete, the 

 divided elements small. Harpe short, with strongly 

 sclerotized, thornlike, more or less appressed clasper, 

 about half as long as harpe. Anellus a shallow U- or 

 V-shaped plate with somewhat produced lateral lobes. 

 Aedeagus, long, slender (needlelike), slightly curved; 

 penis unarmed. Vinculum stout, about twice as long 

 as greatest width; slightly tapering to a moderately 

 broad terminal margin with a pair of anteriorly pro- 

 duced lateral lobes. 



Female genitalia with signa developed as two 

 elongate, narrow, opposed plates armed with short, 

 stout, thornlike spines, longitudinally arranged; bursa 

 othenvise membranous, large, more or less pear shaped; 

 ductus bursae for half its length from bursa, very 

 narrow, ribbonlike, sclerotized and bent at middle, 

 globular and membranous beyond, and thence triangu- 

 larly expanding into the simple genital opening; ductus 

 seminalis from bm-sa near its junction with ductus 

 bursae. 



The genus is certainly distinct and easily distin- 

 guished from other phycetine genera by its peculiar 

 genitalia. It contains what appear to be three tropical 

 American species. These may eventually prove to be 

 no more than races of a single variable species, but at 

 present we are not justified in such a grouping. We 

 know nothing of their life history and our knowledge of 

 their distribution is too fragmentary to permit more 

 than speculation as to their status. 



367. Chorrera idiotes Dyar 

 Figures 34, 422, 914 



Chorrera idiotes Dyar, Proc. U. S. Nat. Mus., vol. 47, p. 331, 

 1914. 



Forewing gray with a fine dusting of white scales, 

 making the ground color a dark ashy gray; transverse 

 lines narrow, faint, whitish; antemedial line slightly 

 oblique, sinuate-angulate, with a narrow, obscured, 

 outer edging of black scales; subterminal line somewhat 

 more distinct, sinuate, with narrow inner and outer 

 dark borders, pronounced and black at costa; discal 

 dots very faint, when distinguishable, black and sepa- 

 rated; a row of faint, confluent, blackish dots along 

 terminal margin. Hind wing translucent white; a dark 

 smoky shade along costa and a narrower smoky shade 

 along terminal margin; the veins not darkened except 



