220 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



and, as in pulcTira, also an oblique hair line or narrow crease just 

 distad of the bristle, originating caudo-distad of the apex of the stig- 

 mal vein; the latter differs from that of unifasciata in forming a some- 

 what shallow, nevertheless regular, concave curve along the inner 

 margin with the apex of the marginal vein. Also agreeing with nigra 

 somewhat, but easily distinguished by the differences in the coloration 

 of the body and wing and the form of the stigmal vein, as well as the 

 longer marginal cilia of the wings. The mandibles are bidentate and 

 black at tips; the tarsi are pallid yellow, their distal jomts dusky; the 

 longest marginal fringes (caudad) of the posterior wing are three- 

 fourths or slightly more the greatest width of those wings. The tibial 

 spurs are single, the cephalic ones, as usual, many tined beneath. 



From 6 specimens, the same magnification. 



Male. — The same. 



From 2 specimens, the same magnification. 



Described from 2 males and 6 females mounted in balsam: One 

 female m the collections of the United States National Museum, 

 mounted on a tag (now in balsam with the type of unifasciata) and 

 labeled "No. 2488*^^ Yrom Aleurodes on Hydroxyhn. Issued Dec. 

 29, '81 " ; 1 male, 4 females, on a slide in the collections of the United 

 States Department of Agriculture, labeled ''1624. Lecanid — Inglisia 

 on cotton, Cuautla — Morelos, Mex. July 1, '97. Koebele," liomo- 

 types; and a male and female from the same collections on a single 

 slide labeled "1755. Pulvinaria on ash, Cuautla, Morelos, Mex., 

 May 29, '97. Koebele," types. 



Habitat. — North America — Mexico (Cuautla, Morelos); one other 

 unknown locality. 



Hosts. — Pulvinaria sp. on ash; Inglisia sp. on cotton; Aleyrodes 

 sp. on Hydroxyhn. 



Types.— Cat. No. 14201, U.S.N.M. One male, 1 female in balsam, 1 

 slide (Mexico). 



Homotypes. — ^Accession No. 45088, Illinois State Laboratory of 

 Natural History, Urbana, the 1 male, 4 females as noted above 

 (Mexico). 



21. SIGNIPHORA HYALINIPENNIS, new species. 



Normal position. 



Female. — Length, 0.75 mm. ; moderate in size for the genus. 



General color black, the mesoscutum finely, transversely Imed ; legs 

 and antennae brown, tarsi pallid ; wings wholly hyaline or very faintly 

 clouded proximad, their venation brown; a narrow transverse silvery 

 white band across the space between the mesoscutellum and meta- 

 scutum which narrows so much mesad as to disappear, nearly, at the 

 meson and thus is broadened and accented at each side (dorsal aspect) ; 

 mesoscutellum brownish. 



