NO. 1977. MONOGBAPR OF THE SIGNIPH0RIN2E—GIRAULT. 219 



like a subquadrate silvery white area some distance cephalad of the 

 tegulse at the cephalo-lateral angle of the thorax, but in direct light 

 the whole band is visible) ; both wings hyaline excepting the fore wing 

 at extreme base under the proximal third of the submarguial vein; 

 venation dusky. 



Belongs to the unifasciata group ; it differs from unifasciata struc- 

 turall}^ in that the fore wings have distinctly shorter marginal cilia 

 at apex which are only about a fourth the greatest wing width, in 

 unifasciata over a half; the caudal wings are narrower; the inner edge 

 of the stigmal vein forms no curve with the inner edge of the marginal 

 at its apex, or, in other words, the stigmal vein makes no distinct angle 

 with the marginal. From, fasciata^ it differs in the form of the stigmal 

 vein, which in that species makes a concave curve along its inner 

 margin with the ajDex of the inner margin of the marginal vein, not 

 true with this species ;fasciata also bears the discal bristle on the fore 

 wing ; from both unifasciata and fasciata, melancJiolica differs in its 

 longer and somewhat narrower abdomen. From rhizococci it differs 

 in the broader posterior wing, the shape of the stigmal vein and the 

 absence of the discal bristle, aside from the obvious differences in 

 color. 



From 1 specimen, the same magnification. 



Male. — Unknown. 



Described from a single female specimen in balsam, from the col- 

 lections of the United States Department of Agriculture and labeled 

 "1° 3 f. Gn. 2, sp. 7. Saman, July 26, 10. T." (Collected by 

 C. H. T. Townsend.) 



Habitat. — South America — Saman, Peru. 



Host. — Not known. 



Type.— Tyipe No. 14200 U.S.N.M. One female in balsam. 



20. SIGNIPHORA FASCIATA, new species. 



Normal position. 



Female. — ^Length, 0.65 mm., mean. Moderate in size for the genus 

 but variable, sometimes robust. 



Like unifasciata in general coloration, but considerably smaller and 

 differing as follows : In general coloration the fore wings differ in that 

 they are fumated out to the apex of the venation and the general 

 black of the body is suffused with more brownish. Structurally 

 differing in that the marginal fringes of the fore wing are decidedly 

 shorter, the longest being not more than a third or fourth of the wing's 

 greatest width, whereas in unifasciata they are over two-thii'ds the 

 greatest width of the fore wing in that species; the marginal fringes 

 of the posterior wing are not subequal to those of the fore wing, as in 

 unifasciata, but longer; the discal bristle of the fore wing is present, 



> Described next. 



