Casey — Observations on the Staphylinidae. 371 



ture stronger than in Leiolinus; antennae moderately thick, the outer 

 joints moderately transverse and somewhat compactly joined, the second 

 and third more or less distinctly elongate and equal or nearly so, each 

 notably narrower and longer than the fourth; median frontal grooves 

 short, feeble, subparallel and not very conspicuous, the oblique ocular 

 grooves subobsolete or very feeble, Nearciic Pacific coast. 



Hesperolinns 



24 — Body still larger than in Hesperolinus; hind tarsi with the first two 



joints equal in length; punctuation of the head and pronotum very floe 

 and somewhat sparse, the former with the basal angles broadJy rounded ; 

 eyes small; frontal grooves short but broadly impressed and distinct, 

 arcuately converging, the oblique ocular grooves shorter, straight and 

 rather distinctly impressed; antennae longer than usual and loose, but 

 little enlarged apically, the second and third joints equal, more or less 

 elongate and generally narrower thougb perceptibly longer than 

 the fourth; third palpal joint much elongated, the fourth very 

 short, only slightly oblique, rather slender but obtusely subconical; 

 gular sutures very fine, arcuate, becoming extremely approximate but 

 not united from before the middle ; tarsi very slender, filiform . Sonoran 

 regions of America Leiolinas 



25 — Frontal grooves long and deeply impressed; fourth joint of the maxil- 



lary palpi slender, aciculate, about three-fourths as long as the third; 

 labrum deeply emarginate; dorsal series of the pronolum always regular 

 and composed of about six punctures; hind tarsi witb the first four 

 joints subequal, each but little longer than wide, the fifth about as long 



as the three preceding combined. South Africa "^Notolinvs 



Frontal grooves always very feeble and usually much shorter; fourth joint 

 of the maxillary palpi shorter, strongly conical, generally but little 

 more than half as long as the third; labrum less emarginate; dorsal 

 series of the pronotum irregular and composed of a greater number of 

 punctures; hind tarsi slightly more elongate, the first two or three 

 joints much longer than wide and decreasing uniformly in length. 

 South Africa °^Notolinopsig 



26 — Body moderately convex and slender, parallel, not very coarsely but 



densely punctured, the punctures of the elytra arranged without order; 

 head oblong, rather depressed, not modified at the sides, the basal 

 angles rounded ; median frontal grooves obsolete, represented by feeble 

 cariniform converging lines, the ocular grooves wholly obsolete; eyes 

 small; antennae well developed, the basal joint distinctly more than 

 half as long as the remainder, the outer joints only moderately thick- 

 ened, the second and third equal in length, much elongated, each some- 

 what longer than the fourth and fifth combined; maxillary palpi 

 unusually elongate, the fourth joint small, oblique, slender and acicu- 

 late; gular sutures uniting at a short distance behind the oral cavity and 

 thence continuing as a very fine single line to the base; neck unusually 

 Blender, about a fifth as wide as the head ; prosternum long and well 

 developed before the coxae, the surface almost evenly and feebly con- 

 vex, the hind margin cusped at the middle as usual; hind tarsi moder- 

 ately slender, the basal joint slightly longer than the second; middle 



