PROC. ENT. soc. WASH., VOL. 21, NO. 8, NOV., 1919 181 



although the puncture from which they spring is clearly visible 

 on each side. I cannot satisfy myself that there is any setigerous 

 puncture inside of the hind angles and believe that the basal 

 bristle is absent in this species. 



DESCRIPTIONS OF NEW NORTH AMERICAN PTINIDAE, WITH 

 NOTES ON AN INTRODUCED JAPANESE SPECIES. 



BY W. S. FISHER, U. S. Bureau of Entomology. 



In arranging the material which has accumulated during the 

 past two years in the family Ptinidae in the National Museum 

 Collection, the following new species were found. The types of 

 all these new species are deposited in the United States National 

 Museum. 



Ptinus mitchelli, new species. 



Female. -Moderately elongate, nearly parallel, brown with the median 

 part of the elytra only slightly darker. Antennae with second joint sub- 

 quadrate, about one-half the length of the third; joints 3 to 9 subequal in 

 length and about two and one-half times as long as wide, each slightly in- 

 creasing in width from base to apex (joints 10 and 11 broken off). Eyes 

 moderately prominent, separated on the front by about two times their 

 vertical diameter and about equal in width to the combined length of the 

 second and third joints of the antennae. Head densely, finely granulate 

 and pilose. Prothorax coarsely granulate and hirsute, the hairs yellowish, 

 with a distinct longitudinal series of whitish hairs on each side of the middle, 

 extending from the basal constriction to near the frontal margin, and with 

 a transverse series of whitish hairs in the constriction which are separated 

 at the middle. Elytra at base nearly twice as wide as the prothorax and 

 fully three times as long; humeri prominent; sides nearly parallel, slightly 

 wider at apical third; surface moderately strongly punctate-stria te, the 

 intervals a little wider than the punctures, each with a series of brownish 

 or yellowish suberect hairs which vary somewhat in length, the longest nearly 

 equaling the distance from the suture to the third stria; setae of the strial 

 punctures somewhat shorter and more inclined; at base and apical fourth 

 a conspicuous fascia of white recumbent, squamiform hairs; the anterior 

 oblique fascia reaching from near the humeral angle to third stria; the pos- 

 terior transverse fascia reaching from near the lateral margin to the third 

 stria, and also a short subsutural spot of similar hairs behind the middle on 

 the third interval. Scutellum densely clothed with whitish recumbent 

 hairs. Metasternum and abdomen densely clothed with fine whitish re- 

 cumbent hairs; the former as long as the second and third ventral segments 

 united. Fourth ventral segment fully two-thirds as long as the third and 



