AMERICAN COLEOPTERA. 133 



Fr.m-tle. — Spur of anterior tibise robust but acute at tip; inner spur of mifldle 

 tibise robust but longer than in male. 



This species occurs from Pennsylvania to Colorado. 



Grroup O contains also but one species, readily known by the un- 

 equal spinules fringing the apex of the hind tibiae, head not tubercu- 

 latc, thorax distinctly sinuate at the sides near the basal angles, basal 

 marginal line wide and deep, clypeus emarginate and broadly rounded, 

 elytra oval, mesosternum between the coxse feebly convex, hind tibiae 

 stout, first joint of the hind tarsi equal to the three following 

 united. 



A. ovipennis, n. sp. — Oblong, brownish or piceous, moderately shining. Head 

 not densely nor coarsely punctured; clypeus emarginate at middle, broadly 

 rounded on each side ; gense prominent. Thorax broader than long, nariower 

 at base, sides broadly rounded in front, rather deeply sinuate near the hind an- 

 gles, base broadly rounded, margined line broad, deep, and coarsely punctured ; 

 surface moderately convex, very coarsely and deeply punctured. Elytra oval, 

 broadest at middle, convex, rather deeply striate, strife rather finely and dis- 

 tantly punctured, interspaces moderately convex, very sparsely punctulate. 

 Body beneath piceous black, legs rufo-piceous. Mesosternum coarsely punc- 

 tured, between the coXiB convex, sub-carinate. Epipleurse visible from above, 



humeral angles consequently dentiform. Length .30 — .34 inch ; 7.5 8.5 



mm. 



The three specimens before me show no sexual characters anion"- 

 themselves. The species is one of the most distinct in our fauna and 

 may readily be distinguished from any Aphodius known to me by the 

 characters above given. 



Found under stones in dry places at Fort Tejon, Cal. 



Aphodius cadaverinus, Mann. Bull. Mosc. 1843, ii, 201. 

 The descrijition of this species (from Russian America) is too short 

 and uncharacteristic to enable me to define its position. 



DIALYTES, Harold. 

 Diali/tcs. Harold, Col. Ilefte, V, I8til), 101. 



D. truncatus, Mels. Proc. Acad. 2, 135. corvinus, Hald. Journ. Acad. Ser. 2, 

 vol. 1, ]). 104. Harold, loc. cit.— Oblong, black, convex. Head strongly deflexed, 

 coarsely but sparsely punctured; front hemihexagonal, sides very feebly 

 rounded; clypeus feebly emarginate. Thorax broader than long, convex, 

 coarsely but not closely punctured, sides feebly rounded in front, deeply but 

 gradually sinuate at base, base distinctly margined. Elytra oblong, broader 

 behind the middle, strongly convex and very obtuse at apex, humeri denti- 

 form ; surface moderately deeply striate, striae punctured, interspaces flat but 

 strongly carinate near the apex, impunctured. Body beneath sub-opaque, 

 coarsely punctured, legs brownish ferruginous, coarsely punctured, tibice with 

 feeble transverse carinse. First joint of middle and hind tarsi longer than the 

 three following. No special sexual characters have been observed. Length 

 .22 — .24 incli; 5.5 — 6 mm. 



TRANS. AMER. EXT. SOC. (18) SEPTEMUKR, 1870. 



