H. C. FALL 
2 !) 7 
bor, d' 9 , collected 20 by C. W. Johnson): N('\v Hanip' 
shire (Holderness, let’, Prof. A. P. Alorse) : iMassachnsetts 
(Saugus, 1 cf — type, 1 9 from Bridgewater, both fi-oni collec- 
tion of F. ’\^d^ldo Dodge)' New York (Chauinont River, Jeffer- 
son County), IX -21-19, 1 cf — Notman). 
So far as seen, this species is separable with certainty from 
borealis — the only one which it strongly reseml)les — l)y the paler 
lateral margins of the ventral segments, l)nt if this should fail 
the genitalic characters offer a definite means of identification. 
25. Gyrinus pernitidus LeCoiite 
(5f soniewliat less than medium size, form rather strongly convex. Al)ove 
l)lack, sides usually bronzed, surface highly polished and without visible 
micro-sculpture in either sex. Punctures moderate, those of the lateral rows 
a little larger. Body beneath metallic Irlack, last ventral typically and 
u-sually more or less rufous, epipleura and hypomera sometimes faintly ru- 
fous. 
Mdle (jctnlalid. — Reddish brown, median lobe slightly dilatc'd apically, 
where it is fully three-fourths as wide as the lateral lolies; angulate at lip, 
upper surface a little concave apically and with a median carina which docs 
not attain the apex. 
Length, 4.9 to 5.2 mm.; width, 2.6 to 2.9 mm. 
Type locality. — (leorgia. Descrilted from a single female, 
with wdiich LeConte unites a ^Massachusetts female from Dr. 
Harris. 
This sjtecies is probably not rare from (Maine to New Jersey, 
but is usually mixed with other species in collections. It is 
known to me from Paris, (Maine: Farmington and Ilooksett, 
New Hampshire: Wakefield, Tyngsboro and SudbutA^, (Massa- 
chusetts: Chatsworth and Atco, New Jersey: Indiana {piceolas 
Blatchley). 
In a fairly good series, pcruilidus shows ratlnu’ h'ss varialion 
in size than usual, the great majority of specinuais lunning 
pretty close to 5 mm. in length. Let'onte gives a haigth of 
6 mm. in his description, but his type really nieasui'cs o.T mm. 
to the tip of the elytra, the largest example I have seen. 
The species seems (juite constant in its other characters, 
about the only variation worthy of notice being in the color ot 
the anal segment and of the ei)i]:)leura, the latt('r Ixang not 
rarely slightly rufescent at base, and occasionally more' com- 
pletely so. 1 believe that piceohis Blatchley is nu'rely an ex- 
TR.\N.S. .\M. ENT. SOC., Xm il. 
