EMBIOPTERA OF THE NE.W WO'RLD ROSS 479 



sharply pointed; inner process (10 RPg) narrow, half as long as 

 10 RPi. Ninth sternite (H) pigmented at lateral thirds only, sub- 

 membranous medially, quadrate, sides arcuate; process (HP) broad, 

 prominent, parallel-sided, right side shorter than left, apical margin 

 diagonal. Left paraproct (LPPT) large, well pigmented, longer than 

 HP, fused along entire inner side to H and HP ; apex acuminate, termi- 

 nating as a small projection. Left cercus-basipodite (LCB) very 

 large, greatly extended ventrad, bilobed mesad — the ventral lobe very 

 dark, stout, acute; the upper projection sclerotic, directed dorsad, 

 furcate from near base, the furcations closely paralleled. Basal seg- 

 ment of left cercus (LCi) continuous with LCB, cylindrical basally 

 but very abruptly produced inward as a large lobe apically; inner 

 margin darkly pigmented ; outer apical angle membranous. Terminal 

 segment of left cercus large, cylindrical, gradually tapered, rounded 

 distally. Basal segment of right cercus complex; basal foramen ir- 

 regular, margin greatly produced ventrally ; inner margin dark, very 

 deeply emarginated, apex lobed internally; outer apical third mem- 

 branous. Terminal segment of right cercus similar to that of left. 



FeTnale (in alcohol). — Pale brown throughout, intersclerotal mem- 

 branes light straw 3^ellow; head amber yellow with dorsal pattern 

 prominent; antennae, except the two basal segments, cholocate brown. 

 Length 5.0 mm. 



Head and hind basitarsi similar to melanura. 



Abdominal sternites: Seventh sternite faintly pigmented, lateral 

 darker areas apparent but not prominent ; eighth sternite without more 

 strongly pigmented lateral areas; ninth sternite broadly, transversely 

 emarginated as in melanura. 



The female of lohafa, tliough of a different subgenus, is structurally 

 scarcely separable fiom mslanura. This is additional evidence that 

 females of the order are of little value in systematics. 



Holotype.—MaX^, on slide (U.S.N.M. No. 56585), collected at Palm 

 Grove, near Brownsville, Tex., September 29, 1942, and allotype., fe- 

 male, on slide, collected within the city limits of Brownsville, Tex., 

 September 28, 1942 ; both collected by the writer. 



Paratypes. — Numerous males and females with above data, depos- 

 ited in the California Academy of Sciences, the Museum of Compara- 

 tive Zoology, and the writer's collection. 



The type specimens, with young and eggs, were collected in small 

 colonies on the bark of trees and under the flaky thin bark of dead 

 limbs and trunks. In the latter situations the abandoned burrows 

 of boring insects are apparently used as retreats from excessive heat 

 and predators. 



