AMERICAN MOTHS OF THE SUBFAMILY PHYCITINAE 



43 



abdominal segment with a pair of weak, short, ventro- 

 lateral hair tufts. 



Male genitalia with apical projection of gnathos an 

 elongate, slender, simple hook. Uncus subtriangulate, 

 apex roxmded. Transtilla complete, weU sclerotized 

 and strongly arched; produced at middle into a flat, 

 broadly and bluntly forked projection. Harpe with 

 costa sclerotized throughout and projection slightly at 

 apex; otherwise simple. Anellus U-shaped. Aedeagus 

 smooth, slightly flaring at apex; penis with a single, 

 straight, short, weakly sclerotized, spikelike cornutus 

 and a few minute and weak scobinations; otherwise 

 unarmed. 



Female genitalia with signa present as an oval cluster 

 of thornlike scobinations ; bursa otherwise smooth, large; 

 ductus bursae considerably shorter than bursa, simple; 

 genital opening simple; ductus seminalis from anterior 

 (terminal) end of bursa. 



This genus is another subtraction from the composite 

 genus Myelois of Authors. Of all the American species 

 that have been referred to that genus it is the nearest 

 to the type of Myelois {medullalis Hiibner, a synonym 

 of cribrella Hiibner) of any American species, agreeing 

 with cribrella in forewing venation, except that the stalk- 

 ing of vein 10 with 8-9 is less consistent in cribrella than 

 in bistriatella. In cribrella 10 is often short stalked (as 

 in fig. 38) ; but it is as often from the cell, connate with 

 or approximate to or distinctly separated from the stalk 

 of 8-9. In bistriatella it is from the stalk of 8-9 on aU 

 specimens that I have seen. However, this difference 

 has no more than specific significance and would not of 

 itself justifj' any separation of bistriatella from Myelois. 

 There are some other differences that, in my judgment, 

 are of generic character and justify such separation. 

 The hind wing venation and length of cell are similar in 

 cribrella and bistriatella except for the anastomosis of 

 veins 7 and 8 ; in cribrella this anastomosis is very weak 

 and shorter than it is in bistriatella and would place 

 typical Myelois in our venational division B, while 

 Apomyelois would go definitely into division C. In male 

 genitaUa cribrella (fig. 203) differs in having apical pro- 

 jection of gnathos developed as a deeply, strongly, and 

 narrowly forked process and the transtilla developed as 

 a simple, strongly arched, narrow band. The female 

 genitalia of cribrella (fig. 684) differs in more striking 

 fashion: the ductus biusae being much longer than 

 bursa and strongly granulate and partially sclerotized 

 throughout most of its length; and ductus seminalis is 

 from the bursa between the signum and the junction of 

 bursa and ductus bm-sae. 



The new genus contains one North American species. 



77. Apomyelois bistriatella (Hulst), new combination 

 Figures 40, 197, 676 



Dioryctria bistriatella Hulst, Ent. Amer., vol. 3, p. 136, 1887. 

 Myelois bilineatella Ragonot, N. Amer. Phycitidae, p. 3, 1887; 



Monograph, pt. 1, p. 48, 1893. — Hulst, Phycitidae of 



N. Amer., p. 117, 1890; U. S. Nat. Mus. BuU. 62, p. 418, 



1902. 

 Myelois bistriatella (Hulst) Hulst, Phycitidae of N. Amer., p. 117, 



1890. — Ragonot, Monograph, pt. 1, p. 51, 1893. — Barnes 



and McDunnough, Contributions, vol. 3, p. 194, 1916. — 

 Forbes, Cornell Mem. 68, p. 613, 1923.— McDunnough, 

 Check list, No. 6067, 1939. 



Forewing gray-brown faintly dusted with white on 

 costal half of basal area and in central area from mid- 

 costa to lower margin of cell; transverse lines white, 

 rather sharply contrasted, especially towards inner 

 margin and without appreciably contrasted blackish 

 borders; antemedial line transverse, from costa dis- 

 tinctly before middle, straight, except for an occasional 

 sUght notch in ceU ; subterminal line somewhat narrower 

 and less distinct, sinuate; dark discal dots at end of 

 cell often fused into a single spot or line along discocel- 

 lular vein, usually set off by the surrounding white 

 dusting of the central area; terminal dots very faint, 

 more or less confluent. Hind wing dull smoky white, 

 the veins slightly darkened and a narrow dark line 

 along termen. Alar expanse, 19-22 mm. 



Genitaha as given for the genus. 



Type localities: Washington, D. C. (bistriatella, 

 type lost?) ; "America septentrionale" (bilineatella, in 

 Paris Mus.). 



Food plant: Unknown. 



Distribution: United States: Florida (Msir.); Dis- 

 trict of Columbia, Washington; A^ew York; Massachusetts, 

 Framingham (May) ; Illinois, Edgebrook (May) ; Wis- 

 consin; loiva, Ames (May). Canada: Ontario, Ottawa 

 (June, July), Trenton (May, June). 



Probably much more widely distributed thi-oughout 

 eastern and central United States and Canada, nowhere 

 apparently a very abundant species. 



The supposed type of bistriatella is labeled "Iowa, 

 H. S. Saunders, June 6, 1886." It is definitely that 

 species but, unless it is mislabeled or the type locality 

 given by Hulst in his original description ("Washington, 

 D. C") is wrong, it could not be the actual holotype. 

 I have seen no specimens anywhere labeled "Washing- 

 ton, D. C." There is a female in the National Museum 

 from the Fernald Collection, bearing a Hulst type label 

 but no locality. This might be the true type. It is a 

 perfect match for the Iowa specimen in the Rutgers 

 Collection. Since there can be no reasonable doubt as 

 to what the name stands for we may as well consider 

 the holotype lost and forget it. 



21. Ectomyelois, new genus 



Type of genus: Myelois decolor ZeUer. 



Tongue well developed. Antenna of male shortly 

 ciliate (cilia about the length of width of shaft or 

 shghtly less), otherwise simple; of female simple and 

 pubescent. Labial palpus upturned, reaching to or 

 nearly to apex (not above it); second segment some- 

 what broadened with scales; third segment short, 

 distinctly shorter than second, acuminate. Maxillary 

 palpus filiform. Forewing smooth; 11 veins; vein 2 

 from well before angle; 3 from the angle, shortly 

 separated from the stalk of 4-5 at base; 4-5 shortly 

 stalked (very shortly staUied in most specimens and 

 never for more than half the length of the veins); 



