4 THOS. L. CASEY. 



from tlie posterior margin. Elytra at base as wide as the prothorax ; sides 

 very feebly arcuate ; together rather acutely rounded behind ; disk very 

 convex, highly polished, striae very feeble, interspaces flat ; suture twice as 

 long as the head and prothorax together. Last abdominal segment having 

 two short, closely approximate setae on each side near the apex. Color of 

 body throughout dark castaneous, legs and oral organs paler. 

 Length, G.7 mm. Male. 



Arizona (Morrison). 



This species appears to be very distinct, and is much smaller and 

 more slender, as well as more convex than either californica or 

 remotestriata. The striae of the elytra are scarcely visible except 

 with a good lens, and are indistinctly punctulate ; the first joint of 

 the posterior tarsi is very slightly longer than the last. 



A. marylandica n. sp. — Form rather broadly elliptical, sides very 

 feebly arcuate. Head moderate, broader than long ; eyes small ; sides nearly 

 parallel and feebly arcuate behind the eyes, very rapidly convergent before ; 

 surface moderately convex and shining ; supra-orbital setae rather approxi- 

 mate and symmetrically placed in reference to the longitudinal limits of the 

 eye ; antennae short, not as long as the width of prothorax, first three joints 

 rufous, remainder dark castaneous ; emargination of meutum trapezoidal, 

 tooth very short and broad, distinctly sinuate anteriorly, dental setae very 

 close and long, at each extremity of the gular support of the mentum thei'e 

 are two closely approximate and rather long setae ; oral organs pale testace- 

 ous ; maxillary palpi very stout, castaneous. Prothorax one-third longer 

 than the head, distinctly broader behind ; apex broadly and feebly emargi- 

 iiate, base transverse ; basal angles acute ; disk polished, median line feeble ; 

 border narrow, broken for a short distance in the middle of the base ; near 

 each basal angle, there is a small, impressed, punctiform pit ; between this 

 and the median line a small, irregular, dejiressed area, which is very sparingly 

 punctate; just within the raised lateral margin, there is a succession of very 

 fine punctures. Elytra at base as wide as the pronotum ; sides nearly 

 parallel, very feebly arcuate ; together nearly one-half longer than wide, 

 rather acutely rounded behind ; disk polished, extremely finely reticulated, 

 distinctly striate, striae strongly punctate, interspaces nearly flat, just 

 exterior to the eighth stria there is a row of very distinct punctures near the 

 humeri, and a much longer one near the tips, tfcutellum much broader than 

 long, acute behind, sides arcuate. Last abdominal segment bearing on each 

 side near the apex two long stout setae. Terminal spurs of anterior tibiae 

 very strongly developed. Color of body dark piceous-black, having on the 

 upper surface an aeneous metallic lustre ; legs dark rufo-testaceous. Length 

 7.8 mm. % . 



Maryland, banks of the Potomac Kiver, below AVashington ; one 

 specimen. 



This species is remarkable for its very short i)ronotum, tliat of the 

 type being only 1.8 mm. in length, while the elytra are 4. 'J mm., and 



