OF WASHINGTON, VOLUME XI, I'.OQ. 



TWO NEW SPECIES OF NORTH AMERICAN ARADIDyE. 



[Hemiptera, Aradidae.] 

 BY O. HEIDEMAXX. 



Nannium pusio, new species. 



Body small, elongate-ovate, color dark brown. Head as long as 

 '.id with two short ridges at its posterior part; apical process ratln-i 

 short, feebly emarginated at tip, extending hardly 

 half way to the first antennal joint: antennifei <>u^ 

 processes prominent, sharply pointed ; postocular 

 part of head rounded, with a small tooth at each 

 side ; antennas about as long as head and thorax 

 united ; basal joint abruptly thickened towards apex 

 and somewhat bent outwardly ; second joint shorter 

 and less thick; third the longest and cylindrical; 

 t terminal joint pyriform, as long and thick as basal 

 one, with short, whitish bristles at tip; rostrum reach- 

 ing base of head. Surface of pronotum rather coarsely granulated, at 

 disk, anteriorly, two large tubercles and a transverse trisinuate ridge at 

 ihe posterior part of pronotum; a small tooth on each side of anterior 

 margin just below the head ; the anterior margin much narrower than 

 the posterior one ; both margins nearly truncate; the anterior lateral mar- 

 ginal angles prominently lobiform and somewhat reflexed, the posterior 

 part of lateral margins broadly rounded, the edge finely serrate. Scutel- 

 luni triangular, with a sharp ridge down the middle and two small, 

 transverse ones at the base forming a T -like figure. Corium extend- 

 ing a little beyond the middle of second abdominal segment; the sur- 

 Face finely wrinkled, with the nerves prominently raised; the inner 

 margins of corium arcnatc-emarginate, apex obtuse. Membrane dark 

 brown, except the basal portion, which is pale. The connexivum 

 brown, with the posterior margins of the segments lighter and a 

 little thickened. The sides of abdomen rounded in the female; sub- 

 parallel in the male, which has the outer apical angles of the last four 

 abdominal segments quilt- prominent. Genital lobes of the female 

 triangular; those in the male are somewhat narrow at base and oblique 

 truncate at apex. Legs short, finely granulate, femora dark brown 

 with the knees pale ; tibia dark brown towards the tip. 



Length, female. 3.4 mm., width across abdomen 1.2 mm.; male, 3.2 

 iniii.. width 1 mm. 



Two tVmah's and one male, Cincinnati, Ohio (C. Dtirvi. 

 Type No. 12710, U. S. National Museum. 

 This species may rightly In- ivh.TR-1 to tin- gvnus \\uiiiiiini 

 i -ub-familv Brachyrhynchinae), with which it has the prin- 



