NORTH AMERICAN COEEOFTERA. 
318 
of anterior and middle feet cleft close to apex almost bifid, those of 
the posterior feet cleft more nearly the middle. 
Female . — Head dull cupreous or purplish ; prosternum sparsely 
indistinctly punctate, scarcely jiubescent ; claws acutely toothed a 
little in front of middle. 
In the two females before me the underside is purplish black, in- 
cluding the legs, while all the males are brassy. 
Variations . — In the males the thorax is green, inclining somewhat 
to purplish occasionally, while the two females are deep purple. The 
sides of the elytra in both sexes are cupreous, sometimes seneous in 
the males, the intermediate space green, varying to purple in the 
male, and ])urple in the female. 
For this species and one closely allied from Mexico, Mr. Water- 
house (Biol. Cent. Am. vol. iii, ])t. 1, p. 50) has suggested the generic 
name Eng^jaulus, which he separates from Agrilm by the convex 
front, and the mouth consequently more inferior, and the short first 
joint of the posterior tarsi. In a study of our species these charac- 
ters are shown to have no value, as will be seen by an examination 
of the form of the head in the species near which pidchellus is placed 
— Walsinghami, obolinus and mntieus. While the first joint of the 
hind tarsus is short, it is still equal in length to the next two, so that 
when conqiared with these or with the tibia the length is scarcely 
less than in very many species before me. From the fact that there 
are no valid characters for retaining Engyavlus apart from Agriius 
our species is returned to the latter genus. 
Hab . — Arizona and Colorado. 
A. ol»oliiiii»« Lee. — Facies rather robust, color from seiieo-cupreous to i)liini- 
beous, feebly shining, sparsely finely jnibescent. Antenna* short, scarcely attain- 
ing the niiddle of thora-x, seneous, serrate from the fourth joint; front concave, 
coarsely closely punctured. Thorax very little wider than long, sides feebly 
arcuate, margin sinuate, hind angles rectangular without trace of carina, disc 
convex, with a median impression extending from base to apex, widest poste- 
riorly, lateral oblique depression moderate, surface punctate, rather coarsely not 
closely, without strigosity ; scutelluin without trace of transverse carina ; elytra 
feebly sinuate behind the humeri, slightly broadened behind the middle, apices 
obtuse without serrulation, disc moderately convex, with feeble basal depressions 
and two very vague costte on each side, surface moderately closely imbricately 
punctate; body beneath scarcely more shining than above; prosternal lobe 
broadly emarginate, the intercoxal process broad and very obtuse at lip: pro- 
pleurpe coarsely punctate and slightly strigose ; metasternum densely and more 
finely punctate, slightly strigose. Abdomen finely putictate, sparsely at middle, 
more densely at the sides, especially on the first two segments; last ventral seg- 
TRANS. AM. ENT. SOC. XVIII. 
( 40 ) 
OCTOBER, 1891 . 
