29G 
NORTH AMERICAN GYRINUS (cOLEOPTERa) 
Type locality. — Not stated. 
This seoins to lie a rather scarce species, and only a few 
scattering sjieciinens have come to hand. These bear the 
following locality labels: Sherborn and South Framingham, 
Massachusetts (Frost): Wellesley, Mass. (Morse): Amherst, 
Mass. (Cornell Univ. Coll.): Lahaway, New Jersey (Davis): 
liamsey, N. J. (Sleight): Fredericksburg, Virginia (Richard- 
son). 
I have followed LeC'onte in his inter()retation of this sjiecies, 
but am by no means sure that it is the true borealis of Aube. 
Its most notable superficial character — the rather strongly 
impressed lateral striae is not mentioned by Aube; in fact he 
uses the expression “ interstitiis planis.” On the other hand, 
Regimliart’s description of borealis seems to fit our species 
exactly, possibly because he describes from specimens sent by 
LeConte. The corpulentus of Regimliart apiiears to be vir- 
tually identical, except that he describes the epipleura as fer- 
ruginous. As in several of my specimens of borealis the epi- 
pleura are more or less aeneo-rufescent, I suspect that corpu- 
lenLus is no more than a variety of this sort. Superficially 
borealis is scarcely distinguishable from the following species, 
which se(' for a comparative statement. 
Since writing the above 1 have received from the British 
Aluseum Collection a ‘Aype” of Regimbart’s corpalenlus, nnd 
find it to be exactly the borc(tlis of LeConte. 
24. Gyrinus pugionis new .species 
In form, size, sculi)ture and luster this species is practically indistinguish- 
al)l(^ fi ■oin boreuHs, tlie only noticeable difference that I have discovered l)eing 
tliat here the sides of the ventral segments are narrowly rufous or rufescent, 
somewhat as in niaculwenlris, but more narrowly and diffusely so. The 
ei)ij)leura, as in borealis, are at times somewhat rufescent, but perhaps rather 
less markedly .so. 
Male (jetdlalia . — Of same type as in borealis, (!olor rufo-testaceous, ter- 
minal limair portion (‘xtrcmiely slendei’, hardly more than one-sixth as wide 
as (lu! lateral lobes, and twice as long as the width of (uther of the latter. 
Letojlh, fy.H to ()..'l mm.; width, 2.0.') to ‘.i.f) mm. 
Type localtfy. — Saugus, Massa.chu.s(d fs. d\vi )0 (d^) in flu^ 
aul h()i'’s colh'cfion. 
'Phis specie's seems (luite as scai'ce' as the jire'ceding, and 1 
have' be'leeie' me' eeidy six e'xamph's, as feelleews: Alaine' (Bat Hat- 
