82 Annals Entomological Society of America [Vol. X, 



Idiocerus subnitens n. sp. 



(Figs. 1, 2, 3.) 

 Resembling /. lachrymalis in shape, slightly smaller and 

 shiny, with a distinct brown median transverse band. Length 

 6 mm. 



Vertex broad and very short;, longer next eye than at middle, 

 anterior margin slightly produced. Pronotum two and one-half times 

 as wide as long; humeral angles broadly rounded and posterior margin 

 slightly excavated. Elytra rather long, greatly overlapping at apex and 

 well rounded; venation strong. Face broad, front almost as broad as 

 long, margins angled at antennae, gradually and evenly narrowed to 

 clypeus. Loras long, outer margins slightly rounded. Antennal pits 

 unusually deep. ' 



Color: Vertex pale yellow; two round spots in pits, a broad band 

 just beneath with a spot extending back next either eye, and two 

 extending back and diverging on the margin, black. A transverse row 

 of four rather large white spots include the antennae. Front, upper 

 half pale; lower portion, clypeus and inner portions of loras, dark brown. 

 Pronotum pale, irregularly marked with dark brown forming four 

 rather distinct blotches, one in either humeral angle and one either side 

 of middle on the disc. Scutellum yellow, basal angles, two round spots 

 on disc and a median line between them dividing just back of middle 

 and extending to apex, dark brown. Elytra dark brown, iridescent; 

 inner margin of clavus, and a transverse band just back of clavus milky 

 white, subhyaline, apex smoky hyaline. Beneath light brown. 



Genitalia: Female last ventral segment almost twice as long as 

 preceding; rather evenly rounded from base to produced apex. Pygo- 

 fers broad and stout, much exceeded by ovipositor. 



Described from one female specimen swept from poplar 

 at Tomah, Wis., August 2, 1916. This mature specimen 

 differed so considerably from any known species by several well 

 marked characters that it was thought advisable to describe 

 it specifically. 



1797. I. snowi G. & B. 



1800. I. crataegi VD.— One specimen St. Croix Falls, Aug. IG, 1916. 



1801. I. provancheri VD. 



1807. Macropsis gleditschiae (O. & B.) — Madison, Milwaukee. 



1808a. M. virescens var graminea (Fabr.). — Southern part of state. 



1809. M. viridis (Fh.). 



1810. M. occidentalis VD. — Southern part of state. 

 1815. M. basalis (VD.) — Southern area. 



1818. M. bifasciata (VD.)— Southern. 



1824. Oncopsis variabilis (Fh.). 



1825. O. sobrius (Walk) — Southern points. 

 1828. O. fitchi VD. — Southwestern points. 



