108 BULLETIN BROOKLYN ENTOM. SOC. VOL. VIL. December 1884 ] 
end 
==: 
gathered in summer and brought from Arizona, the beetles appearing 
the following December indoors. 
BIBLIOGRAPHY. 
1. Balaninus obtusus, n. sp. 6—8 mm. N, H., Mass., Nebr., Tex. 
2. uniformis, Lec. Pacif. R.R. Rep. 1857, p. 57; Horn, Proc. Am. Phil. Soc. 1873, 
p- 459.—4.5 to7 mm. Can., Eastern and Middle States, Kans., Tex., Cal., Or. 
3. nasicus, Say, Curc. N.A., p. 16; Am. Ent. edit. Lec., 1. p. 279; Gyll. Schoenh. 
Gen. Cure. 111, p. 377; Horn, Proc. Am. Phil. Soc. 1873, p. 460; nasatus || Say 
loc. cit.; rostratus Gyll., loc. cit,, p. 374; sparsus Gyll., loc. cit., p. 379, 4.5— 
8.5 mm. astern and Middle States, Geo. Kans. 
4. caryae Horn, Proc. Am. Phil. Soc., 1873, p. 460, 5 tog mm. Ind. 
. rectus Say, Curc. N.A., p. 16; Am. Ent. edit. Lec. 1, p. 279; Horn, Proc. Amer. 
Phil. Soc. 1873, p. 459; rectirostris Gyll. Schoenh. Gen. Cure. 111, p. 376; Sayi 
Gyll., loc. cit., p. 375. 5—7 mm. Middle and Southern States, Ariz. 
6. quercus, Horn. Proc. Am. Phil. Soc. 1873, p. 458. 5—9.5 mm. Mass. Tex. 
7. caryatrypes Boh. Schoenh. Gen. Curc. VII, 2, 276; Horn, Proc. Am. Phil. Soc. 
1873, p. 458. 8—11 mm. Middle States and Westward. 
wn 
—\!!|—s»> 2 + eee 
Note on the species of Gaurotes, Ze Conée. 
By FREDERICK BLANCHARD. 
With the exception of the observation on the form of the mesostern- 
um I am indebted to Dr. Horn for the following notes: 
The genus Gaurofes as hitherto defined would only include G. cyanz- 
pennis. G. abdominalis and, as Mr, Ulke has informed me, G. Cressonz 
have the mesosternum simple as in the genus Acmacops, not protuberant 
as in the first mentioned species. The superficial resemblance however, 
of the three species is temarkable. They differ as follows: G. cyani- 
pennis has the antennz entirely pale and the abdomen piceous with slight 
metallic lustre; abdominalis with the same form of body has from one to 
three basal joints of the antennz piceous and the abdomen yellowish 
testaceous, while Cressonz with a more robust form of body has the anten- 
nz, tips of femora, tibize and tarsi piceous and the abdomen as in aé- 
dominalis, — 
The variation in the torm of the mesosternum is an indication of 
the instability of what are usually regarded as valid generic characters. 
A strict interpretation of the mesosternal structure would separate these 
species. For the present they might remain associated until a renewed 
study either better develops the difference between Acmaeops and Gau- 
rotes or shows the necessity, of uniting, them. 
