ll. C. FALL 
291 
is exposed, the difference in color — brownish pieeous in Icconfei 
and riifo-tcstaceons in aquiris — will at once settle the question. 
Consobrinus is even closer to aquiris, and I am ([uite convinced 
that there are no superficial characters l)y which they may be 
certainly distinguished; consobrinus, how('ver, is a Pacific Coast 
species extending its range eastward to Utah, and I do not 
know that their ranges overlap at any point. 
17. Gyrinus lecontei new .species 
Rather broadly oval, moderately convex, black with bluish reflections, 
sides consi)icuously green bronzed; surface highly polished, with an excessively 
fine alutaceous sculpture and sjjarse extremely minute punctulation, barely 
detectable with a one-fourth inch triplet; stria! punctures only very slightly 
coarser at sides, eleventh stria quite close to the margin. Beneath brownish 
ferruginous with diffusely paler margins. 
Male genitalia . — Pieeous brown, becoming paler basally; median lobe 
gradually acuminate from base to tip, the apex superiorly carinate (roof 
shapeil). 
Length, o.'l to 0.2 mm.; width, 2.8.7 to .‘L4 mm. 
Type locality. — Shei'l)()rn, Alassachusetts. The type is :i 
nude collecte<l and given nu' by Mr. ('. A. Frost and Ixau’S dat(' 
X 1-18-17. 
ddiis is the si)('ci('s whicli la'Conte supposed to be tlu' cen- 
tralis of Kirl)y. It occurs commonly in th(> region (‘xtcuidiug 
from New England to tlu' (baail Laki's. Tlu' following locali- 
ties are known to nu'. 
Maine (Monmouth and Paris): New Hampshire (Farming- 
ton; Starr Lake, Mount Washington): Massachusetts (Sher- 
l)orn; Framingham; Natick; W('lleslcy; Swampscott; 1 yngs- 
l)oro): New York (Ithaca; Keene Valley; Westfield): Michi- 
gan (Agricultural College — H. E. W eed) : Illinois (('hicago; 
“X". 111.”): Wisconsin: Ontario (Toronto). 
In the color of the lower surface this species agrru's closcdy 
with aquiris and consobrinus, and is es])ecially likely to lu' con- 
founded with the former, which occurs in the same' ix'gion. 
Aquiris is of somewhat narrow(‘r form and avc'ragt's a littk' 
smaller than lecontei, but ix'coui'se to th(‘ giaiitalia is lu'cessai} 
for certainty in separation. 
TUANS. AM. KNT. S()(’., .XI.VII. 
