( 
157 
ses of the mandibles. The joints are short and quadrate, the 
st and the fourth about equal to the third. The epistoma is 
j msverse, about three times as wide as long, narrowing rapidly 
•.ward, the anterior margin concave for the reception of the labrum 
.The mandibles (Fig. 4, C) are curved, rather narrow, 
3 width being about two-thirds the length, and comparatively 
Dad and obtuse at tip, where they are more or less clearly emar- 
late or sometimes trifid. Externally each bears two strong 
,nder hairs at the base. 
The cardinal piece of the maxilla is not distinct from the basal, 
le maxillary lobe (Fig. 4, B, c) is about two-thirds as broad as 
lg, rounded at the tip, and provided with about ten spines of 
rying length along the inner margin, the two basal of which are 
T strong, and about half the length of the lobe. This last reaches 
ly a little beyond the third joint of the palpus. The palpi (d) 
3 four-jointed, the first joint broad, imperfectly separated within, 
3 second shorter, the third about as long as the first and second 
gether, the fourth narrow, cylindrical, and one-half the length of 
3 third. 
The labrum (a) is thick and fleshy, nearly semi-circular in outline, 
3 palpigerous tubercle scarcely evident; the palpi (b) unarticulate, 
mdncal, narrowed distally, and about as long as the third joint 
the maxillary palpus. The ligula is fleshy, broad, and bilobed. 
The tubercles at the ends of the ventral ridges project downwards 
f°nd the general ventral surface (Plate IX, Fig. 4, E, a and b), 
;h bearing about ten hairs of varying lengths, the three or four 
- gest being longer and stronger than any others on the larva, 
e hairs on the median part of the ventral ridges form an unbroken 
v, about nine in number, alternately longer and shorter, with many 
y short ones intermingled. The longest of these hairs are as 
g as the corresponding segments. 
Adult— (Plate VIII, Fig. 4). In the genus Colaspis the anterior 
: rgm of the thorax is straight beneath, not projecting in the form 
lobes behind the eyes, and the head is destitute of supraocular 
oves. The thorax is margined at the base, and the second joint 
the antennae is shorter than the third. 
|-he species Colaspis brunnea is entirely ochreous or testaceous; 
I id sparingly punctate; antennal tubercles smooth, coppery; eyes 
arginate; thorax rather transverse, sides broadly rounded, re- 
i :e d> somewhat explanate; base rounded, thickly and deeply (disk 
re sparingly) punctate; elytra with eight smooth sub-costate inter- 
i :es, the punctures between them sometimes uniseriate, and at 
ers irregular or triseriate ; thoracic epipleurae punctate. In variety 
i ipennis the head and thorax are metallic green; elytra brown, 
li four yellow costate interstices. Every lead can be found 
ween these extremes. 
LIFE HISTORY. 
Ill 
he adult beetle is said by Fitch to appear in the latter part o: 
ie, continuing through the month of July. Prof. Biley, in his 
| r d Missouri Beport, says that the larva commences to pupate ir 
T': 
