CRIOCERIS. 45 
Crioceris alternans (p. 15). 
Crioceris costulata, Lac. huj. op. p. 15. 
To the locality Mexico, add :—Queretaro (Dr. Palmer), Oaxaca, Yolotepec (Sallé). 
An examination of a series of specimens subsequently received has proved to me 
that C. costulata is the female of C. alternans, Lac. The differences pointed out by 
Lacordaire are only sexual—thus in the male the punctuation of the elytra is closer 
and more or less confluent, while the raised coste are less distinct than in the female ; 
the posterior femora are, as usual, shorter in the female; and the abdominal tufts 
of hairs are nearly always present in the males of the Central-American species of 
Crioceris. The punctuation of the elytra in the present species is subject to a good 
deal of variation, and in one specimen (a female) the coste are very strongly raised and 
smooth. In all other respects the two insects treated by Lacordaire as distinct are 
similar. - 
Crioceris smaragdina (p. 15). 
The specimens from Zapote referred to C. smaragdina belong, I think, to the following 
closely-allied species. I have not seen any specimens which I can satisfactorily refer 
to Lacordaire’s species. 
8 (a). Crioceris curvipes. 
Metallic green; the seven terminal joints of the antenne dark blue; thorax finely transversely strigose ; 
elytra very finely semipunctate-striate, the interstices finely rugose at the sides ; femora very robust, the 
anterior and posterior tibiz curved. 
Length 3-44 lines. 
Head with a few fine punctures, and a deep longitudinal median groove, the space round the eyes strongly 
rugose; antennz more than half the length of the body; the first four joints metallic green, the others 
dark blue ; thorax slightly longer than broad in the male, the sides scarcely constricted, the surface trans- 
versely strigose throughout; scutellum finely punctured; elytra with a very shallow depression below the 
base and a more or less distinct lateral fovea, the surface very finely and rather indistinctly punctate- 
striate, with two rows of deeper punctures extending from the shoulder obliquely inwards, the sides 
irregularly rugose towards the apex, the apical interstices not raised; femora short and swollen, the 
tibiz in the male (and to a less extent in the female) distinctly curved; abdominal segments in the male 
furnished with small tufts of whitish hairs at the sides. 
Hab. Guatemaua, Cerro Zunil, Zapote (Champion). 
C. curvipes may at once be separated from C. nitida and C. smaragdina by the tibie 
being distinctly curved, in connection with the finely rugose sides of the elytra; it also 
differs from C. smaragdina by the strigz of the thorax. The prosternum is very narrow, 
but just visible ; the femora in the female insect are less robust, and the tibia are not 
quite so much (though distinctly) curved. 
8 (z). Crioceris nitidicollis. 
Metallic green; thorax transverse, nearly impunctate, shining; elytra very finely and almost regularly pune- 
