Ball — Neio Genera and Species of Acocephalinae. 167 



Vertex rusty straw color, a dark band just back of the marj^in. Prono- 

 tum rusty straw with the margin Hned with white. ScuteHuni rusty, a 

 pair of triangular spots just inside the angles and a pair of round dots on 

 disc. Elytra rusty subhyaline with the nervures light, mostly margined 

 with smoky brown. Claval nervures including the transverse veinlets 

 and all transverse nervures on corium broadly ivory white. 



Genitalia: Female segment long with a broad and equally deep, black- 

 margined, median excavation. 



Described from a single female from the hills back of Pasadena, Cali- 

 fornia. A male from the same locality which probably belongs here is 

 darker and has rather long-triangular plates with bluntly rounded tips. 

 The ivory white markings on elytra will separate this species from sig- 

 nata, while the genitalia are quite distinct from that of coquilletti. 



Drionia new genus. 



Resembling UJileriella in color and venation, but differing widely in 

 form of head. Head resembling Driotura, but still broader and shorter 

 and with the lower part of face strongly inflated. 



Vertex short and broad, a little over one-half as long as the pronotum, 

 anterior margin broadly evenly rounding, one-fourth longer in the 

 middle than against the eye. Surface sloping and rounding over to the 

 inflated front without definite margin except for a slight carina on the 

 median third. Ocelli one-third the distance from the eye to apex. Front 

 inflated, almost vertical for two-thirds of its length, then rounding into 

 the long narrow clypeus. Lorae elongate, strongly transversely convex. 

 Pronotum scarcely twice wider than long, anterior margin broadly round- 

 ing, posterior margin very slightly roundingly emarginate, surface trans- 

 versely wrinkled. Elytra short, broad, coriaceous, shghtly inflated 

 behind the middle. Venation similar to Uhleriella, the second cross- 

 nervure present, anteapical cells long, apicals short, veinlets to costa at 

 both extremities of the anteapicals reflexed and usually forked or doubled. 



Type of genus, D. nigra n. sp. 



This genus together with Cochlorhinus and Uhleriella are all peculiar 

 to the Pacific coast region, and while differing widely in head characters, 

 all have the same type of venation and are usually black or dark with 

 ivory ornamentation. 



Drionia nigra n. sp. 



Resembling the alate form of Driotura gammaroidea. Superficially 

 resembling black examples of the genus Macropsis. Black, the male with 

 an oblique dash on each elytron. Length, 4 mm. ; width, 2 mm. 



Vertex sloping, rounding to the front without a definite margin except 

 for a slight carina, one-third longer on middle than against the eye. 

 Front broad, tumid, rounding back to the small slender clypeus. Elytra 

 broad and short, gibbous behind the middle. Venation as in Uhleriella 

 except that the outer anteapical is not acuminate posteriorly. 



