126 GEO. H. HORN, M. D. 



antemiffi are 11-jointed in both sexes here, while in iiigripenais S 

 they are 10-jointed, as stated by Say. 



Occurs abundantly near Washington, D. C. (Schwarz), and from 

 thence westward to Missouri and Texas. 



P. paralleltis n. sp. — Form moderately elongate, parallel, slightly de- 

 pressed. Head yellow, slightly darker than the thorax, sparsely finely pinu^tate. 

 Thorax' wider than long, slightly narrowed behind, sides slightly arcuate in 

 front, thence oblique to the hind angles, disc moderately convex, with a vague 

 cresceutic transverse depression, surface smooth, color yellow ; scutellum yellow. 

 Elytra but little wider than the thorax ; black, shining, the lateral margin nar- 

 rowly yellow, surface alutaceous, sparsely punctulate; epipleurse yellow. Body 

 beneath and abdomen piceous. Legs yellow, the hind tibire and tarsi and upper 

 line of femora piceous. Length .18 inch. ; 4.5 mm. 



Male. — Autennse entirely yellow, except upperside of first joint, joints two 

 and three small, together not as long as the fourth, joints four to ten gradually 

 shorter, eleventh longer; middle tibiie deeply emarginate on the innerside near 

 the apex, first joint of front tarsus very short. 



\ Female. — Antennae slender, darker than in the male, formed as in subsidcatus ; 

 middle tibise simple; first joint of front tarsus as long as the second. 



This species may be known in the group in which the male an- 

 tennae are 11-jointed by its more parallel form and relatively broader 

 thorax. From (iubsiilcatu.3 it is distinguished by its smoother elytra 

 and yellow scutellum, and from dorsalls by the yellow margin and 

 epipleurse, and by the pale antennae. 



Occurs in Texas, region unknown. 



P. Silbsiilcatlis n. sp. — Piceous black, shining, head and thorax entirely 

 yellowish. Head smooth ; thorax distinctly wider than long, slightly narrower 

 behind, sides anteriorly slightly arcuate, then neai'ly straight and slightly con- 

 vergent to base, disc convex, a slight fovea each side, surface smooth ; scutellum 

 piceous. Elytra vaguely subsulcate, distinctly punctate and slightly alutaceous 

 smoother near the apex. Body beneath piceous black, shining; femora in great 

 part piceous; tibise and tarsi usually pale. Length .12 inch. ; 3 mm. 



Male. — Antennae ferruginous, gradually thicker to tip, 11-jointed, joints two 

 and three small and similar, together shorter than the fourth, joints eight and 

 nine subequal, these shorter than either the seventh or tenth; middle tibiae 

 deeply emarginate on the innerside near the tip; first joint of front tarsus dis- 

 tinctly shorter than the second. 



Female. — Antennte piceous, slender, 11-jointed; third joint slightly longer 

 than the second, the two together equal to the fourth ; middle tibiae simple, 

 first joint of anterior tarsus as long as the second. 



Variations. — The abdomen is nearly always piceous, but specimens 

 are before me with yellow abdomen. A specimen % is before me, 

 probably partially immature, in which the scutellum is yellow, and 

 the basal portion of the elytra also, gradually shading into the pice- 

 ous. The epipleurae, abdomen and legs are also yellow. 



