EDWARD P. VAN DUZEE. 75 



trasting with the dull black of the anterior lobe ; hind margin rather 

 deeply arcuated. Scutellum black, nearly flat, about equilateral. 

 Elytra short, coarsely punctured ; piceous-black inclining to castane- 

 ous exteriorly on the corium and along the commissural and scutellar 

 margins of the clavus ; the claval margin of the corium slenderly but 

 conspicuously, and the costa more indefinately whitish, thus forming 

 an M-shaped mark when the elytra are closed. Membrane shorter 

 than broad, rounded behind, white aCbase, abruptly pitchy at apex; 

 Beneath black, coxas and legs castaneous or rufo-ferruginous, darker 

 at apex; anterior femora piceous across the middle, strongly inreas- 

 sated, with about three small teeth along the inner (anterior) edge, 

 the apical the larger. 



Described from nine examples from Victoria (presumably 

 Vancouver Island) in the collection of the Museum of Com- 

 parative Zoology, and five from Olympia, Washington, in 

 the Cornell University Collection. The Victoria specimens, 

 which were kindly sent me by Mr. Henshaw, bare the MSS. 

 name Megalonotus angustatus Uhler, which I have adopted, 

 using, however, the earlier generic name Rhyparochromus. 

 The elytra sometimes become pale castaneous, but the con- 

 spicuous M-shaped marking seems to be constant. I have 

 seen only brachypterous examples. This is the second 

 North American species of Rhyparochromus known to me. 

 Of the other, Megalonotus sodalicius Uhler, I have seen two 

 examples taken in California by Mr. J. C. Bradley and be- 

 longing to the Cornell University Collection. 



Plintliisus americanus n. sp. 



Closely allied to the European lasiomerus, a little larger and paler. 

 Head impunctate, polished, apex of the cheeks produced in a minute 

 spine either side of the tylus. Antennae distinctly tomentose ; first 

 joint surpassing the tylus by one-half its length, second about one and 

 one-half times the length of the first ; third and fourth fusiform, each 

 about the length of the first. Rostrum reaching nearly to the front 

 line of the intermediate coxas, the first joint attaining the prosternum, 

 the second slightly longer. Pronotum but little narrowed anteriorly, 

 the sides feebly sinuated posteriorly ; anterior angles abruptly rounded 

 behind the eyes; posterior lobe coarsely punctured, anterior smooth, 

 polished, with a row of small punctures behind the anterior margin; 

 hind edge feebly concave. Scutellum equilateral, a little raised above 

 the elytra, closely punctured. Elytra polished, closely punctured, the 

 punctures more obscure on the disk of the corium, those of the clavus 

 larger and arranged in lines. Membrane short, attaining the middle 



TRANS. AM. ENT. SOC, XXXVI. APRIL, 1910. 



