516 I'liOCEEDIXaS OF THE yATIOXAL 3IUSEUM. vol.44. 



medial ground band very narrow, far removed from the tubercukte 

 pits. Tuberculate pits separated from one another by a distance 

 equal to one and one-half the diameter of either; pseudosuture 

 I'longate, rather deep ; i>its and pseudosuture shiny black. The sjjace 

 in front of the pseudosuture pale, whitish. Scutum dull gray with 

 two bro\vn stripes on either side of the middle line, continuations of 

 the prffiscutal stripes; scutellum pale, grayer anteriorly, a large 

 oval brown medial spot ; post-notum duU gray with a naiTow black 

 medial line. Pleural stripes rather indistinct; ground color whitish 

 with two oblique brownish bands, one along the dorsal edge of the 

 epipleural sclerites, the second along the ventral edge of these sclerites; 

 sternum gray Asith two indistmct brown bands. Halteres pale, knob 

 darker. Legs — Fore: brownish yellow; femora, apical half dark 

 bro^v'n \vith a subajjical band of pale yellow hairs; tibia dark basallj'^, 

 lemaiuder of tibia and three basal tarsal segments whitish; two 

 apical tarsal segments brown. Middle: femora, dull yellow with an 

 apical brown band; tibia and tarsi as in the foreleg. Kind: femora, 

 apical half dark brown with a veiy narrow yellow suba])ical band; 

 tarsi and tibiae as in the foreleg. 



Wing: cells A, Cu, M and caudal half of K almost hyaline; cells C, 

 Sc and cephaUc half of E brown with large spots; one at the base, 

 one at the origin of Rs, one at Sc2, one at cross veui r and fork of 

 R2+3; apices of cells Rg, R5, M,, bro^^^l; also narrow margins along 

 most of the vems in the caudal half of the wing. (See fig. 25.) 



Abdomen: brown, apices of the tergal segments paler. 



Male. — Similar to the female but has a narrow brown line running 

 along the middle of the mesothoracic priescutum, making the thoracic 

 dorsum tri-vittate; this stripe ends far before the suture; the brown on 

 the wings is less extensive, producing a verj' pale picture. Legs 

 rather darker, especially the nuddlo femora. 



Habitat. — Holotype. — Female, Sahna Cruz, Oaxaca, Mexico (Frodk. 

 Knab). Allotype. — Male, Vera Cruz, Vera Cruz, Mexico, December 14, 

 1907 (F. Knab). Paratype. — Sex (?), Acapulco, Mexico (F. Knab). 



Type. — In U. S. National ^Museum collection (No. 14924). 



ERIOPTERA (MESOCYPHONA) EISENI, new species. 



Vertex vai'iegated; mesonotum light brownish-yeUow : jileural 

 stripes rather distinct; wings brownish, the spots only on the veins, 

 few in number (about 16) and subequal. 



Male. — Length, 3.3-3.6 mm; wing, 3.1-3.2 nun. 



Female. — Length, 3-3.3 mm; wing, 3.2-3.4 mm. 



Head: rostrum and palpi dark browai; antenna^ |)ale yellow 

 throughout; outer margui of the front and vertex along the iimer 

 side of the eye, light yellow; rest of the head brown. 



Thorax: pronotum, scutum light yeUow; scutellum pale whitish. 

 Mesonotum: pra^scutum light l>rownisb-}ellow, extreme lateral mar- 



