Law son: Genus Acinopterus. 117 



sanguineous. Abdomen pale, frequently black above, excepting the broad 

 lateral margins; infuscated on the basal and apical segments of the venter in 

 the females; slightly suffused with a pale median line in the males. Elytra 

 pale fulvous, frequently whitish hyaline on the disc of the costal and some of 

 the discal areoles of the corium, and on the inner margin of the clavus, the 

 extreme apex clouded with smoky or even blackish; nervures pale, edged 

 with brownish, the marginal with a fuscous interruption at tip; claval suture 

 brown. Wings smok}^ iridescent, nervures fuscous. 



Genitalia. Male: Valve wanting. Plates long and narrow, a little longer 

 than the last ventral segment, about one-third wider at base than at 

 their obtusely lanceolate, divergent tips. Pygofers twice the length of the 

 plates, narrowed and obtusely pointed at apex, armed beyond the plates with 

 numerous stout spines. Female: Last ventral segment rather long, hind edge 

 with a shallow median notch, either side of which is a broadly roimded lobe, 

 retreating at the outer angles. Pygofers rather broad, their subacute apex 

 moderately exceeded by the oviduct. 



Described from 5 males, 3 females. Maryland, September 29 and August 4, 

 on pines (Uhler) ; North Carolina (Osborn) ; New Jersey (Uhler) ; mountains 

 of northwest Colorado (Gillette); California (Coquillett). 



In a male from California the lower surface of the femora is black. A 

 female from North Carolina has the disc of the elytra white-pruinose, and all 

 the specimens exhibit considerable variation in the extent of the black 

 markings. 



The writer gives the following description : 



A large, rather robust, brownish species, ranging from a greyish-brown to a 

 usually dark-brown color. Length, 5 to 7 mm. 



Form. Head distinctly narrower than the pronotum. Vertex usually 

 distinctly produced medially, about half longer at the middle than next the 

 eyes and about twice as broad as long. Front broad, lorae large, cheeks wide, 

 clypeus widened apically. Pronotum over twice as wide as long, anterior 

 margin usually a little more curved than posterior, the lateral and humeral 

 margins subequal, the disc transversely wrinkled. Scutellum large, the surface 

 granular. Tegmina moderately long, the costal margin running straight 

 clear to the apex, forming an acute tip. 



Color. Vertex, pronotum and scutellum brownish to olive green, the 

 scutellum with basal angles and three longitudinal lines, light. Tegmina usually 

 shining dark brown, sometimes lighter. When dark brown the nervures are 

 lighter and some of the cells, especially along the costa and on the clavus, are 

 subhyaline or greenish. Light specimens have the viens, especially apically, 

 bordered with brown. Face olive green, unmarked, or with faint arcs on the 

 front. Below olive green, marked more or Ipss with dark brown or black, 

 especially on the thorax, coxse and tergites of the abdomen. 



External genitalia. Female: Last ventral segment twice as long as preced- 

 ing, broad basally, lateral margins rounding to slightly notched and produced 

 posterior margin ; pygofers bearing a few scattered spines and slightly exceeded 

 by ovipositor. Male: Valve not visible, plates long and narrow, parallel- 

 margined, obtuse apices somewhat divergent and greatly exceeded by spiny 

 P3'-gofers. 



