AMERICAN COMPONENTS OF THE TENTYRIINyE 4OI 



Length 1 0.7-1 1 .S mm. ; width 4.6-5.3 mm. Kansas (Pratt Co.), 

 — Warren Knaus knausi n. sp. 



6 — Epistomal lobe very sharply triangular, with the sides straight ; 



integuments distinctly metallic in lustre... 7 



Epistomal lobe obtuse and either ogival or rounded ; lustre generally 

 not or feebly metallic : 8 



7 — Body elongate-oval, convex, the elytra brownish-testaceous, the 



lustre throughout very bright aeneous, the surface polished ; pubes- 

 cence sparse but distinct, rather conspicuous on the male pro- 

 notum ; head sparsely, moderately coarsely punctured, more 

 closely laterally, finely but not densely on the epistoma, the orbi- 

 tal carinte distinct (9) or obsolescent {(^) ', prothorax (9) 

 small, transverse, trapezoidal, with the two ridges very strong, 

 becoming unusually prominent anteriorly, the general surface 

 very finely, sparsely punctate; prothorax {(^) much larger, less 

 transverse, with the sides more rounded, the surface nearly even, 

 less finely but sparsely punctured medially, somewhat coarsely 

 and less sparsely laterally ; scutellum tumid, rounded, metallic ; 

 elytra much wider than the prothorax, especially in the female, 

 with distinct, rather narrowly impressed lines, minutely, sparsely 

 punctate, less minutely but still finely and rather sparsely and 

 with the surface only a little less shining toward the sides ; abdo- 

 men rather finely but strongly, only moderately sj^arsely punc- 

 tate medially. Length 8. 3-9. 8 mm. ; width 3.6-4.2 mm. New 

 York to Texas (near the sea-beaches) arundinis Lee. 



Body not very stout, convex, more oblong-oval, polished, the elytra 

 duller, especially toward the sides, black, the elytra less deeply, 

 the legs and antennas deep black, the lustre viridi-agneous anteri- 

 orly and beneath, scarcely metallic on the elytra, the legs non- 

 metallic ; vestiture short and inconspicuous ; head rather finely, 

 very sparsely punctured medially and but little less sparsely an- 

 teriorly, more coarsely but still loosely toward the eyes, where 

 the carinas are distinct and sharply elevated even in the male ; 

 prothorax {(^) nearly one-half wider than long, trapezoidal, with 

 feebly arcuate sides which are not at all sinuate anteriorly, the 

 apex fully three-fourths as wide as the base, with the angles acute 

 and not at all blunt but not in the least everted, the basal angles 

 acute and very feebly everted, the surface even, rather finely but 

 strongly, sparsely punctured, less sparsely toward tip, not very 

 coarsely, perforately and still sparsely laterally, except along the 

 immediate edges where the punctures are a little closer but not 

 dense ; scutellum rather large, rounded ; elytra oblong, obtuse 

 behind, with very feebly arcuate sides, strongly rounded at base, 

 at the middle about a third wider than the prothorax, with feeble 

 but distinct impressed lines, minutely, sparsely punctured sutur- 

 ally, still rather finely but more closely and shallowly so laterally ; 

 abdomen rather finely but strongly, not very sparsely punctured 

 medially; female unknown. Length 10. o mm. ; width 4.8 mm. 

 Texas (near El Paso) aeneicoUis n. sp. 



