Coleopterological Notices, V. 351 



Washington State (Spokane). 



The male from which the above description is taken, has the apex 

 of the sixth termite prolonged in the middle in a short broad trun- 

 cate ligula, and, between this and each side, there is a slender spine 

 as long as the ligula, which is gradually and feebly bent toward the 

 middle. This species was taken by Mr. Wickham, apparently in 

 considerable numbers. 



P. complanata is said by Mr. Fauvel to occur in Massachusetts ; 

 among other differences it has the joints of the antennae much less 

 transverse than tacomae. 



SILUSA Erichs. 



S. vesperis n. sp. — Stout, subparallel, rather thick and convex, blackish, 

 the elytra rather more rufo-piceous ; legs pale ; antennae dark red-brown, 

 paler toward base ; integuments strongly shining throughout, the abdomen 

 highly polished ; head and pronotum extremely finely and very sparsely 

 punctate ; elytra strongly densely and subasperately punctate, the abdomen 

 finely, sparsely so, almost impunctate toward apex ; pubescence rather coarse, 

 not dense but distinct, very sparse on the abdomen. Head distinctly wider 

 than long, scarcely four-fifths as wide as the prothorax ; eyes moderate, setose, 

 at rather less than their length, from the base ; antennae long and rather 

 strongly^ incrassate, finely pubescent and bristling with long erect setse, fully 

 as long as the pronotum and elytra, second joint a little shorter than the 

 third, the latter elongate but shorter than the first, fourth and fifth feebly 

 obconical, the former a little longer than wide, the latter as wide as long, 

 tenth about one- third wider than long, eleventh as long as the two preceding. 

 Prothorax transverse, three-fifths wider than long, widest at the middle ; sides 

 broadly arcuate anteriorly, feebly convergent and slightly sinuate toward 

 base ; apex truncate, slightly narrower than the base, the latter broadly, 

 distinctly arcuate, becoming straight or very feebly sinuate near the basal 

 angles, which are obtuse but distinct ; disk broadly convex, with a small 

 transverse impression in the middle near the base. Elytra nearly one-half 

 wider than long, just visibly wider and distinctly longer than the prothorax ; 

 sides parallel, very feebly arcuate ; humeri slightly rounded to the pronotum ; 

 lateral apical sinuations strong ; disk feebly impressed along the suture. 

 Abdomen at base slighty narrower than the elytra, as long as the anterior 

 parts ; sides subparallel toward base, feebly convergent behind ; border rather 

 thick ; first three tergites transversely impressed at base ; fourth and fifth 

 equal in length. Legs moderate ; first joint of the hind tarsi slightly longer 

 than the second, the fifth as long as the preceding three; fourth joint of the 

 intermediate rather longer than the other three together. Length 2.8 mm. ; 

 width 0.85 mm. 



