OF AMERICA NORTH OF MEXICO. 
323 
5. A. sTRioiLATus.—Niger parcius pubescens, capite valde punctate, thorace minus dense punctate, antice 
angustate, utrinque censtricte, cenvexe, vix canaliculate, elytris densius punctatis, testaceis, vitta 
humerali, apieeque truncata nigricantibus. Leng. -S. 
Lee. Ag. Exp. 
Leptura strigilata, Fabr. £1. 
L. semimarginata, Rand. B. J. 2, 20. 
Maine and Lake Superior. Varies with the elytra entirely fuscous. 
6. A. DisceiDEUs.—Niger, epacus, parce pubescens, capite linea frentali Isevi, therace parcius punctate, 
antrersum angustate, apice censtricte, disce triangulariter valde depresse, ante basin utrinque 
tuberculatira preminule, elytris sat gresse punctatis, apice truncatis, sutura margineque teto aurantiacis. 
Leng. -3. 
Lee. Agassiz Exp. 
Pachyta discoidea, Hald. 60. 
Lake Superior, Massachusetts, and Pennsylvania. 
7. A. PRCTEus.—Niger pubescens, therace punctate, antrersum angustate, apice censtricte, disce triangulariter 
medice depresse, canaliculate, ante basin utrinque preminule, elytris punctatis, pestlce paule angustatis, 
apice truncatis, rufis, vel nigris, vel sutura vittisque lata fuscescentibus. Leng. -4. 
Lee. Agass. Exp. 
Leptura Proteus, Kb. N. Z. 186. 
Pachyta sublineata, Hald. 60. 
Lake Superior and Pennsylvania. The feet vary from black to rufous, the base 
of the femora is always rufous. 
^3. Corpus crassum, elytris parallelis, ore non attenuato. 
8. A. ATER. —Vielaceo-niger, capite theraceque dense punctatis, hec antrersum angustate lateribus medie 
ebtuse angulatis, elytris gressius punctatis. Leng. -SO. 
Oregon. Mr. Wilcox. Dilfers from the following in the thorax which is not at 
all constricted or channeled. 
9. A. NiGRiPE.VNis. —Flave-testaceus vix pubescens, capite fusee, therace cenvexe, disce parce punctate 
antrersum angustate, prefundius censtricte, basi medice censtricte, lateribus subangulate, elytris 
punctatis, nigris. Leng. •4. 
Missouri. Dr. Engleman. Body short and thick, testaceous, scarcely pubescent, 
head densely punctured, fuscous, mouth pale, antennae half as long as the body, 
fourth joint a little shorter than the fifth, first joint pale. Thorax shining, with a 
few scattered punctures, transverse, narrowed and deeply constricted in front, 
posterior constriction fainter, sides obtusely angulated. Elytra twice as wide as the 
tnorax, scarcely twice as long as wide ; punctures less deep than in the following 
species, a little smaller tow^ards the ape.x, which is rounded. 
82 
