1889] MARYLAND ACADEMY OF SCIENCES. 41 



covers margined all around with a very narrow border, crossed 

 by divaricating veinlets which form groups at the ends of the 

 apical veins, veins coarse, basal areole oblong quadrangular, 

 with the ends oblique, followed behind by two small angular 

 cells, behind which are two very large irregular areoles, fol- 

 lowed by the transverse series of six areoles, the two middle 

 ones of which are the largest of all and irregularly quadran- 

 gular in form, the apical series consisting of six or seven cells, 

 graduating smaller towards the inner margin of the wing-cover. 



D. obscura. New sp. 



Form as seen from the side broad ovate, with the transverse 

 diameter almost equal to the longitudinal. Color very pale 

 brownish yellow, marked with brown. Face margined with 

 pale brown, which continues upon the vertex in a line adjoining 

 the eyes, medial carina prominent, bright yellow, becoming nar- 

 rower above and ending in a minute point at the vertex ; eyes 

 brown, prominent, subglobose, set in a wide orbit which is 

 brown behind ; rostrum pale brown. Pronotum pale yellow, 

 brownish on the sides, the anterior margin narrowly recurved 

 and carried far forward on the head, with a curved impression, 

 carrying two indented points just back of the border. Scutel- 

 lum broad, bluntly triangular, deeply impressed near each basal 

 angle, the angle broad, tabulate, brownish. Wing-covers 

 broadly, unevenly spread with brown on the apical division, 

 with a large oblique spot of the same color near the base, and 

 with a few blackish points on the apical and costal raised 

 edge. Beneath pale yellow, polished. Legs pale yellow, with 

 a brown mark on the coxae and base of femora, and the tips of 

 tibiae and tarsi darker brown. Length to end of wing-covers, 

 3|-4 millims ; to end of abdomen, 3 millims. Width of pro- 

 notum, 1 millim. This abnormal and curious insect has thus 

 far been obtained only in Central California and near San 

 Francisco. One specimen was given to me by Mr. Henry 

 Edwards, and another was captured by James Behrens. It 

 bears some resemblance to Neaethus Stal, but differs widely 

 from that genus in the reduced number of its areoles and their 

 exaggerated proportions on the central portion of the wing-cover. 



