350 Coleopterological Notices, V. 



obtuse but very distinct, not in tbe least blunt; disk even, unimpressed, 

 feebly convex. Elytra transverse, nearly one-third wider and one-half longer 

 than the prothorax ; sides parallel, feebly arcuate; humeri broadly exposed 

 at base ; disk flattened, very feebly, broadly impressed on the suture toward 

 base. Abdomen distinctly longer than the anterior parts, much narrower than 

 the elytra ; sides parallel, nearly straight ; border thick ; under surface 

 finely, densely punctate and densely clothed with long decumbent pubescence. 

 Posterior tarsi three-fourths as long as the tibiae. Length 3.3-3.6 mm. ; width 

 0.85 mm. 



Arizona (Benson). Mr. G. W. Dunn. 



The general appearance of this insect suggests a community of 

 habit with the large Maseocharee of the same regions. 



PLACUSA Erichs. 



The following species perfectly resembles the European compla- 

 nata, but is narrower, with shorter antennae, and denser and still 

 more obscure sculpture. 



P. tacomaB n. sp. — Oblong-elongate, strongly depressed, black through- 

 out, the legs and antennae piceous, the elytra frequently paler; integuments 

 extremely dull opaque and minutely, densely granulato-reticulate, the elytra 

 rather less opaque, the abdomen shining ; head and pronotum very minutely, 

 extremely densely and almost undistinguishably punctate, the elytra rather 

 less minutely, extremely densely and more visibly so, the abdomen distinctly 

 bat very densely punctate, more sparsely near the apex ; pubescence very 

 minute and scarcely noticeable. Head large, wider than long, distinctly nar- 

 rower than the prothorax, the surface flat ; antennae one-half longer than the 

 head, the basal joint a little longer and thicker than the second, the latter 

 longer and much thicker than the third, which is longer than wide and 

 strongly constricted at base, four to ten very strongly transverse, seven to ten 

 equal in width, about twice as wide as long, eleventh obtuse, as long as the 

 preceding two. Prothorax twice as wide as long, the sides just visibly conver- 

 gent from base to apex and broadly, strongly arcuate ; base broadly, strongly 

 arcuate, becoming feebly sinuate near the basal angles, which are obtuse but 

 well marked ; disk not distinctly impressed. Elytra at base a little narrower, 

 at apex somewhat broader, than the prothorax, about one-third longer ; sides 

 straight ; humeri completely concealed at base ; apex transversely truncate ; 

 disk flat. Abdomen distinctly longer than the anterior parts, evidently nar- 

 rower than the elytra, the sides subparallel at base, becoming gradually con- 

 vergent behind ; border rather thick, the first tergite very narrowly and 

 feebly, the others not perceptibly, impressed at base ; fifth much longer than 

 the fourth ; ante-basal infraelytral tergite corneous and frequently exserted. 

 Legs short ; tarsi long, the posterior evidently shorter than the tibiae, with the 

 first joint about as long as the next two. Length 1.9 mm. ; width 0.7 mm. 



