50 



UNITED STATES NATIONAL MUSEUM BXTLLETIN 207 



terminal white line narrow, faint, sinuate and sharply 

 dentate below costa, bordered at costa by a pair of 

 narrow, short, blackish dashes; a row of separate black 

 dots along termen. Hind wing white, translucent. 

 The veins faintly darkened and a narrow dark shade 

 along termen. Alar expanse, 27-30 mm. 



Male genitalia with aedeagus smooth and evenly 

 tapering from base. 



Type locality: Colombia (type in USNM, 61317; 

 paratype in BM) . 



Food plant: Unknown. 



Described from male type and two male paratypes 

 labeled "Colombia, Fassel." The specimens are only 

 in fair condition. Fresher examples would probably 

 show the black longitudinal streakings somewhat more 

 contrasted and extended. The species has the general 

 habitus of Pseudodivona commensella but is larger. It 

 is easily separated from commensella and aU the other 

 similarly colored and marked species of Pseudodivona 

 and Moerbes by the yellow longitudinal median streak 

 on forewing. This is easily distinguished under slight 

 magnification, even on slightly rubbed specimens. 



89. Protomoerbes separabiKs, new species 

 FiGUEB 207 



SimUar to aberrans except: Less distinctly and exten- 

 sively streaked with black; median yellow longitudinal 

 streak missing from forewing, replaced by a narrow 

 extension of the white ground color, extended to the 

 base of the wing; aedeagus with a thornlike projection 

 from imderside near apex (similar to the projection 

 from the aedeagus of Moerbes emendata but larger and 

 more blunt) . The male genitalia also differ from those 

 of M. emendata in having a proportionally longer and 

 more evenly tapering vinculum. Hind wing smoky 

 white, semi translucent; the veins distinctly darkened. 

 Alar expanse, 29 mm. 



Type locality: San Antonio, Colombia (type inBM; 

 paratype in USNM, 61318). 



Food plant: Unknown. 



Described from male type and one male paratype 

 from the type locality, labeled "San Antonio, W. 

 Colombia, Dec. 07, 5800 feet, M. G. Palmer." The 

 paratype lacks an abdomen. 



Genera 25 and 26: Diatomocera and Pseudocabima 



[Venational division C. Forewing with 11 veins; 4 and 5 stalked 

 for less than half their lengths. Hind wing with veins 7 and 8 

 anastomosed for most of their lengths (free element of 8 short) . 

 Transtilla complete but weakly sclerotized. Uncus spoon- or 

 semispoon-shaped.] 



25. Genus Diatomocera Ragonot 



Diatomocera Ragonot, Monograph, pt. 1, p. 250, 1893. (Type of 



genus; Homoeosoma tenebricosa Zeller.) 

 Cahima Dyar, Proc. U. S. Nat. Mus., vol. 47, p. 329, 1914. 



(Type of genus: Cabima dosia Dyar. New synonymy.) 



Tongue well developed. Antenna of male shortly 

 ciliate (the cilia about as long as width of shaft) ; the 



shaft with notch at base; of female simple and pubes- 

 cent. Labial palpus of male upturned, reaching to or 

 almost to vertex, slender; third segment nearly as long 

 as second, acuminate; palpus of female oblique and 

 slightly longer than that of male. Maxillary palpus 

 filiform. Forewing smooth; 11 veins; vein 2 from weU 

 before lower outer angle of cell; 3 from the angle; 4 and 

 5 shortly stallved (for half or less than half their lengths) , 

 the stalk separated from 3 at base; 6 from below upper 

 angle of cell, very slightly bent towards base; 8 and 9 

 long stalked; 10 from the cell, but approximate to the 

 stalk of 8-9 for some distance; male with an elongate, 

 narrow costal fold. Hind wing with vein 2 from well 

 before lower outer angle of cell; 3 from the angle, connate 

 with the stalk of 4-5; 4 and 5 long stalked; 7 and 8 

 anastomosed for most of their lengths beyond cell, free 

 element of 8 short ; cell about half the length of the cell 

 on male, on female longer; discocellular vein curved. 

 Eighth abdominal segment of male with a pair of 

 ventrolateral hair tufts. 



Male genitalia with apical process of gnathos U- 

 shaped, consisting of a pair of short, blunt arms. Uncus 

 spoon- or semispoon-shaped. Transtilla complete but 

 weakly sclerotized (except along its lateral edges), con- 

 sisting of a broad, more or less finely scobinate plate; 

 weakly attached to harpes. Harpe simple; costa sclero- 

 tized for most of its length, but not produced. Anellus 

 a curved plate with short lateral lobes. Aedeagus stout, 

 straight (or but slightly bent near middle), more or less 

 tapering to apex, moderately long; penis with a few 

 weakly sclerotized wrinklings and more or less finely 

 spined, otherwise imarmed. Vinculum stout, elongate, 

 constricted towards angulate (or narrowly rounded) 

 terminal margin. 



Female genitaHa with bursa more or less finely 

 scobinate; signa present, consisting of a cluster of two 

 or more sclerotized disks; ductus bursae unsclerotized; 

 genital opening simple; ductus seminalis from bursa in 

 the neighborhood of the signa (sometimes between them 

 and the junction of bursa and ductus bursae, but not 

 near the junction). 



The genus is readily recognized by its combination of 

 male characters, the most striking feature of which is 

 the spoon- or semispoon-shaped uncus which is found 

 in only two other American genera — Pseudocabima, 

 which lacks the antennal notch and long costal fold of 

 forewing, and Entmemacornis, which has veins 4 and 5 

 of hind wing completely united. Diatomocera is ap- 

 parently confined to tropical America. Nine species 

 are here recognized. They are represented by scanty 

 and scattered material and nothing is known of their 

 life histories or habits. From the greasy condition of 

 some of the specimens it may be assumed that the larvae 

 are borers. 



90. Diatomocera tenebricosa (Zeller) 

 Figures 42, 209, 565, 686 



Homoeosoma tenebricosa Zeller, Horae Soc. Ent. Rossicae, vol. 16, 



p. 242, 1881. 

 Diatomocera tenebricosa (Zeller) Ragonot, Monograph, pt. 1, p. 



250, 1893. 



