300 GEO. H. HORN, M. D. 



coarse and rather closely placed. Elytra a little wider at base than the thorax, 

 humeri rounded, disc convex, punctures coarser than those of the thorax, but 

 not so closely placed, each elytron with a slender sinuous vitta, incurved at base, 

 a post-humeral branch, near the tip the vitta joins a narrow cresceutic spot, one 

 end of which points anteriorly the other incurved toward the suture. Body 

 beneath piceous, abdomen nearly smooth. Legs entirely piceous. Length .08 

 inch. ; 2 mm. Plate VII, fig. 12. 



3lale. — Last ventral very feebly sinuate on each side, a vague triangular im- 

 pression at apex. Antennae as in bipiistulata. 



Female. — As in bipiistulata. 



This species resembles vittata, but may be known by the form of 

 the apical portion of the vitta. The form of the fifth joint of the 

 antennae will distinguish either sex from that species. 



Occurs at Lakeport, California (Crotch). 



11. I*, bipiistulata Fab. — Oblong oval, moderately robust, piceous, with- 

 out metallic lustre, each elytron with two large, irregularly oval, yellow spots, 

 one humeral, the other subapicnl. Anteunse half as long as the body, distinctly 

 thicker externally, piceous, the basal five joints paler. Head sparsely, finely 

 punctate, not alutaceous. Thorax one third wider than long, narrowed in front, 

 sides feebly arcuate, disc convex, the punctures moderate, not closely placed, 

 surface very indistinctly alutaceous. Elytra distinctly wider at base than the 

 thorax, humeri obtusely rounded, the punctures coai-ser than those of the thorax, 

 but gradually finer towaid the apex, and with a faint tendency to a strial ar- 

 rangement at middle, humeral spot oval, touching the base, not including the 

 umbone, subapical spot elongate oval, but narrower. Body beneath piceous, ab- 

 domen sparsely punctate Legs rufotestaceous, the posterior femora darker 

 beneath. Length .08— .10 inch. ; 2—2.5 mm. Plate VI, fig. 13. 



Male. — Last ventral distinctly sinuate each side, middle lobe moderately 

 prominent and with a rather deep, triangularly oval concavity. Antennae as 

 in Lewisii, but stouter. 



Female. — Last veniral simple, antennae as in the male. 



This species could only be confused with some of the forms of 

 vittata in which the vitta is broken at middle, but in either sex the 

 form of the fifth antenna! joint would easily distinguish it together 

 with the pale legs. I have a specimen, given me by Mr. Dike, with- 

 out elytral spots. 



Occurs from Pennsylvania to South Carolina. 



12.— P. chalybeipeuiiis Crotch. — Elongate oval, moderately robust, be- 

 neath piceous, above bright l)lue Antennae longer than half the body, the outer 

 joints dark brown, basal five joints rufotestaceous. Head sparsely, but very 

 distinctly punctate. Thorax one half wider than long, narrowed in front, sides 

 rather strongly arcuate, disc convex, alutaceous, moderately closely, but not 

 coarsely punctate. Elytra scarcely wider than the thorax, humeri obliquely 

 rounded, punctuation similar to that of the thorax and equally close, with larger 

 punctures forming quite distinct striae near the base, five being very evident. 



