STAPHYLINID^E 239 



fourth, fully three-fifths as wide as the base, the sixth very broadly, 

 obtusely angulate at tip. Length 2.0 mm.; width 0.55 mm. New York 

 (Catskill Mts.). 



This species, as represented by the single male type, is related 

 closely to insipiens, but differs in its more slender form, darker 

 color, longer elytra and notably more slender and filiform antennae. 



Myllaena arcana n. sp. Small, moderately stout, convex, dull in 

 lustre, the minute punctures very close-set and evidently asperulate, 

 except on the abdomen where they are fine, feeble and less dense than 

 usual, with rather longer vestiture than in many other species, the 

 pubescence elsewhere dense, short and only slightly palish; color piceous, 

 the elytra and abdominal tip slightly paler; head half as wide as the pro- 

 thorax, the antennae (cf) rather slender, moderate in length, filiform, the 

 tenth joint one-half longer than wide; prothorax somewhat more than 

 one-half wider than long, widest behind the middle, moderately narrowed 

 anteriorly, the sides broadly rounded, somewhat less so apically, the base 

 feebly arcuate, only just visibly sinuate laterally, the angles very slightly 

 projecting posteriorly but obtuse and distinctly rounded; elytra as wide 

 as the base, but not quite so wide as the widest part, of the prothorax, 

 the suture very slightly shorter than the latter, the apical sinuses dis- 

 tinct; abdomen at base about as wide as the elytral apex, less conical than 

 usual and only very moderately tapering, the fifth tergite broad, nearly 

 three-fourths as wide as the base, the angulation of the sixth (cf ) rather 

 obtuse and more than right; side margins somewhat thin. Length 

 1.4-1.6 mm.; width 0.45 mm. Iowa (Cedar Rapids), Brendel. 



Recognizable by its small size, form of the thoracic base and 

 angles and form and sculpture of the abdomen. 



Myllaena ludificans n. sp. Rather slender but convex, piceous-black, 

 the elytra but little paler, the abdomen pale at the extreme tip, the legs 

 pale; punctures minute and very dense, the lustre dull, the abdomen more 

 shining, the vestiture short and close, with an admixture of slightly 

 longer and more erect hairs; head nearly three-fifths as wide as the pro- 

 thorax, the antennae blackish, slightly pale basally, short and rather 

 stout, evidently incrassate distally, the tenth joint slightly wider than 

 long, the last three-fourths longer than wide, conically pointed in less 

 than apical half; prothorax less transverse than usual, less than one-half 

 wider than long, widest at or near the base, moderately narrowed ante- 

 riorly, the sides broadly, subevenly arcuate, the base feebly arcuate, 

 not sinuate laterally, the angles slightly more than right, somewhat 

 blunt and not projecting posteriorly; elytra as wide as the prothorax, 

 moderately short, the suture fully three-fourths as long as the pronotum, 

 the apical sinuses deep; abdomen slender, the base somewhat narrower 

 than the elytra, evenly conical and gradually tapering, the fifth tergite 

 slightly longer than the fourth and about three-fifths as wide as the first, 

 the sixth obtusely angulate at tip, the margins rather fine. Length 

 1.6 mm.; width 0.4 mm. Rhode Island (Boston Neck). 



