29G GEO. H. HORN, M. D. 



3. P. Tlttata Fab. — Elongate oval, moderately convex, piceous, shining, 

 surface with slight feneous lustre, elytra with a yellow vitta incurved at base, 

 thickened and slightly incurved at apex. Antennae half as long as the body, 

 piceous, the basal two or three joints testaceous. Head sparsely, finely punctate. 

 Thorax about one-third wider than long, narrowed in front, sides moderately 

 arcuate, convex, surface minutely ahitaceous, punctures moderately coarse and 

 close, denser at the sides. Elytra scarcely wider at base than the thorax, humeri 

 obliquely rounded, convex, punctures coarser than those of the thorax, moder- 

 ately closely placed, finer near the apex and with a tendency to a strial arrange- 

 ment in the yellow vitta; the vitta is narrow at middle, incurved at base and 

 with a broad, short, post-humeral branch, the apical third is abruptly broader, 

 slightly incurved at tip. Body beneath piceous, abdomen faintly alutaceous, 

 punctures numerous, but not coarse. Legs piceous, the tibiae and tarsi brown. 

 Length .08 inch. ; 2 mm. Plate VI, fig. 14. 



3Ia1e. — Last ventral not distinctly lobed, at middle slightly flattened and with 

 a vague longitudinal impression extending two-thirds to base. Autennal joints 

 2-3-4 nearly equal in length, the fourth broader, fifth a little broader and nearly 

 equal in length to 3 and 4, sixth elongate oval, 7-10 equal in length, eleventh 

 longer. 



Female. — Last ventral simple. Fifth joint of antennre longer than fourth or 

 sixth, sixth shorter than seventh, joints 7-11 as in the male. 



This is one of our best known species of the Atlantic region, and 

 is closely related to slnuata and oregonensis, differing from the former 

 more especially by the antennal characters of the male, as well as 

 by the incurved base of the vitta. From the second it differs in 

 smaller size, narrower thorax and much narrower vitta and less ro- 

 bust form. 



Specimens often occur with the intermediate })ortion of the vitta 

 wanting, so that markings resemble somewhat bipustalatd, but the 

 two are readily known by the antennal characters. Occasionally 

 specimens are seen with the front and middle legs entirely pale, also 

 the hind tibiae and tarsi. The vitta may be prolonged to the a[)ex. 



Occurs in the entii'e Atlantic region. 



4. P. oregonensis Crotch. — Oblong oval, moderately robust, piceous, 

 shining, surface scarcely aeneous, elytra with a broad, sinuous vitta, somewhat 

 incurved at base, strongly so at apex. Antennae nearly half as long as the body, 

 piceous, three or four basal joints paler. Head j'ather closely, not coarsely punc- 

 tate. Thorax nearly twice as wide at base as long, narrowed in front, sides ar- 

 cuate, di.sc convex, the punctures moderate and rather closely placed. Elytra a 

 little wider at base than the thorax, humeri rounded, disc convex, punctuation 

 a little coarser and closer than on the thorax, the vitta broad, as wide at middle 

 as the distance to the suture, at base incurved, a broad, short, post humeral 

 branch, apical third strongly arcuate and incurved. Body beneath piceous, ab- 

 domen sparsely punctate. Femora piceous, tibiae pale, brown at middle, tarsi 

 pale. Length .10— .12 inch. ; 2.5—3 ram. Plate VI, fig. 16. 



