166 Proceedings of the Biological Society of Washington. 



clavus. Venation of corium regular, two cross-nervures present, apical 

 cells longer than wide. 



Type of genus Goniagnathns palmeri V. D. 



This genus is apparently closely related to the Old World genus Tar- 

 tessus, but differs in the venation and head characters. It appears to 

 liave no close relatives in our fauna, but should be placed between Mem- 

 nonia and Driotura on the one hand and Xestocephalus on the other. 

 It is apparently a South American group, N. palmeri of the southern 

 States and Mexico being the only representatives north of the Isthmus. 

 All the known species are jet black in color. The genus Goniagnathus 

 does not occur in America. 



Uhleriella ziczac n. sp. 



Form of coquilletti nearly, intermediate in color pattern between that 

 species and stygica. Vertex and pronotum dark with narrow light mar- 

 gins. Length, 4-5 mm. ; width, 1.5 mm. 



Vertex almost right angled, the apex slightly acute, slightly sloping, 

 depressed before the margin, especially at apex. Venation as in coquil- 

 letti. 



Color dark iridescent brown shading to black on the anterior part of 

 pronotum. Vertex margins and posterior margin of pronotum lined 

 with white or yellowish white. The inner nervure of clavus, the ends of 

 the outer nervure, all transverse veinlets on corium, the apical margin 

 and the inner fork of first nervure lined with ivory white. These mark- 

 ings appear as three slightly oblique bands across the apical half of the 

 elytra, the inner one connected in a right angle with the line on the 

 inner sector. Below dark, face black with a transverse band crossing 

 lower half of front ivory wiiite. Legs dark, the tibia lined with light. 



Genitalia: Female segment very slightly emarginate and depressed in 

 the center of the posterior margin. Male plates long-triangular, their 

 apices slightly developed as finger-like processes. 



Described from two females and two males from Pasadena, California. 

 Closely related to stygica and coquilletti from the former of which it can 

 be separated by the angular head and tlie white lines, and from the 

 latter by the solid dark head and pronotum and the male genitalia. 



Uhleriella pasadena n. sp. 



Resembling signata in form and appearance. Color pattern similar to 

 coquilletti except much paler. Length, 5.5 mm. ; width, nearly 2 mm. 



Vertex slightly broader than in coquilletti, slightly roundingly right 

 angled, disc sloping with a shallow depression before the margin. Elytra 

 broad, abruptly slightly obliquely truncated posteriorly. Venation simi- 

 lar to ziczac, but with one or two cross-nervures between the claval veins 

 and usually two or three reflex veinlets to costa at the apex of the outer 

 anteapical cell. 



Color rusty straw ornamented with smoky brown and ivory white. 



