4S2 FAMILY XI. STAl'll YI.IXID.l-:. 



l;ii'\ pjilpi 1i-uiic;itc ;it .-ipi'X, fouiili vciy short, slender; auteunie 

 short; tliorax suhcyliiidi-iejil ; hind tai'si with joints one and two 

 slig'htly h)n<i-er tluui thi-ee and four, which are equal. 



930 (2S7G). Ephelis notata Lee., N. Sp. N. Amer. Col., I, 1863, 5S. 

 Elongato-oval. Black, feebly shining; legs and base of antennae red- 



(lish-yelkiw ; elytra each with the apical margin and a small rounded spot 

 at middle reddish-yellow. Thorax snbquadrate, widest at apical fourth, 

 the sides thence almost straight and slightly converging to base; disk 

 densely and rather coarsely and roughly punctate. Elytra at base one- 

 third wider than thorax, feebly widening to tips, which are truncate; sur- 

 face coarsely and densely punctate. Length 2.5-2.7 mm. 

 Lake County; rare. May 25. 



Tribe IV. PROTEININI. 



Species not exceeding 3 mm. in length, having the antennit^ 

 inserted under the sides of the front ; head without ocelli ; proster- 

 num horn-like ])ehind the front coxa?, which are transverse and 

 somewhat prominent; hind coxffi transverse; tarsi 5-jointed. Two 

 genera represent the trihe in the United States. The species of this 

 tribe are treated by 



Fauval. — "Les Staphylinides de L'Americiue du Nord," in Bull. 

 Soe. Linne., II. 1878, 190-196. 



KEY TO GENERA OF PROTEININI. 



(I. Antemiaj with only the last jtiiiit larger; thorax alwaj^s with a median 



impressed line. LXXXVI. Megarthrus. 



ua. AntenmE with the last three joints larger. Protinus. 



LXXXVI. Mk(!Aktiiki's Steph. 1881. (Gr., 'M)ig + joint.") 



Small, broad sulxlepressed si)ecies, having the head nnich nar- 

 rower than tboi-ax, constricted at base; maxillary [)alpi short, the 

 fourth joint shnider and acuminate; antenna^ short, the last joint 

 very large. sul)globose; elytra truncate, covering more than one- 

 half of abdomen ; hind tarsi with first four joints short, equal. One 

 species has been 1al<en and another perhaps occurs. 



KEY TO INDIANA SPECIES OE M EGAUTUUl'S. 



a. Thorax Itlack, tiie sides slightly angulate. excisus. 



aa. Thorax dull yellow, the disk brownish. 931. americanus. 



M. excisus Lee., piceous, narrower than americanus, 2.5 mm. in 

 length, is recorded by Dury from Cincinnati. 



931 (2883). MEGARTnRT\s americanus Sachse., Stett. Ent. Zeit., 1852, 149. 

 Oblong-oval, depressed. Dusky or fuscous yellow; head black; legs 



dull yellow. Head narrower than thorax, finely rugose. Thorax as wide 



