NORTH AMERICAN (^OLEOPTKRA. 
288 
the species and the minor detail of a cabinet arrangement can he 
left to the judgment of those who possess a sufficient number to make 
it desirable. 
Analytical table of Agrilus. 
Auteiinte serrate beginuing at the fourth joint. PI. viii, figs. 11, 12 2. 
Antennae serrate beginning at the fifth joint. PI. viii, figs. 13, 14 24. 
2. — Claws cleft in such a manner that the lower portion is turned inward, nearly 
or quite touching that of the opposite side. PI. viii, fig. 15 3. 
Claws simply cleft, or even almost bifid, the lower portion not inverted. 
PI. viii, figs. 16, 17 8. 
3. — Prosternum parallel between and behind the coxae, the aj)ex obtuse or trun- 
cate 4. 
Prosternum gradually narrowing, the apex acute 6. 
4. — Front flat, occiput feebly impressed ; thorax not impressed at middle, cariua 
of hind angles distinct, the marginal line (seen laterally) sinuous; 
pygidium carinate, not projecting diflicilis. 
Front concave, or deeply impressed; median line of thorax more or less 
deeply impressed, the carina feeble or absent 5. 
o.— Front impressed from the occiput to the clypeus; thorax with a rather 
broad and deep median impression, marginal line straight; py- 
gidium carinate, not projecting; color dull bronze obtusuiii. 
Front deeply concave; median line of thorax impressed, marginal line 
sinuous; pygidium feebly carinate; head and thorax cupreous, 
elytra black f iiscipenuiN. 
6. — Pygidium carinate, the carina prolonged at tip. 
Front deeply impressed ; hind angles of thorax not carinate in either sex. 
riificollis. 
Front feebly impressed; hind angles of thorax feebly carinate in female. 
only lateral i!«. 
Pygidium not carinate, at most a smooth median line 7. 
7. — .Scutellum distinctly transversely carinate; hind tarsi slender, very nearly 
as long as the tibia. 
Tibiae of male on all three pairs of feet mucronate at the inner apical angle. 
Males flattened on the median line of under side and usually pubescent. 
PI. viii, fig. 18 otiosiis. 
Males with the last ventral truncate and fimbriate delectus^. 
Antennae very slender, ciliate on the posterior side with relatively long 
hairs in both sexes criiiicoi’iii<«. 
Posterior tibiae of males not mucronate; sometimes all three pairs are 
scarcely mucronate. 
Head not, or feebly impressed. 
Males with a densely pubescent space on the prosternum. 
iiia$!iculiii ns. 
Males with prosternum slightly pubescent arcimtiis. 
Head deeply impressed (facies of ruficollis) ciiprieollis. 
Scutellum not transversely carinate; hind tarsi rather stout, obviously 
shorter than the tibiae; form robust; elytra scarcely serrate at tip. 
aiig^eliciis. 
