66 
S. ochreus? Larva. Under this name X describe, with great 
misgiving as to its species, a larva found Jnly 28, 1888, in a 
cavity eaten in a bnlb of the clnb rush (Phragmites), where the 
adult Sphenophorus ochreus was very abundant, doing great injury 
to corn and millet.—A thick, footless grub about 12 mm. long by 
5 mm. broad, white, except the head and cervical shield; the for¬ 
mer chestnut-brown, blackening to the clypeus, which is paler than 
either front or labrum. Occiput marked with two pale vittse, 
which meet posteriorly, forming there an indefinite pale patch, and 
diverge toward the mandibles, extending as far as the frontal 
suture. These vittse bordered externally at base by a short dash 
of black. A similar short dash upon each side of the base of the 
head, usually concealed by the first segment of the body. No 
lateral pale vittse as in robust us. Mandibles black; other mouth 
parts brown. 
Head regularly oval, the sides not angular. Occiput with a 
shallow median channel, linear behind, but deepening and broad¬ 
ening to the frontal suture, beyond which it becomes a still deeper 
irregular three-lobed impression, and then continues for a little 
distance on the front as an indistinct slight line. A rather large 
distinct vertical frontal impression on either side of the terminal 
portion of this line, extending into the conspicuously corrugated 
frontal area. Front with a curved transverse row of four bristles, 
the lateral ones at its anterior margins, two additional bristles 
above these, near the frontal suture. Corrugations of the front 
transverse, interrupted by irregular smooth patches. Sides of front 
with indistinct vertical ridge or obtuse angle just within base of 
mandibles. Occipital vitta with two bristle-bearing punctures, one 
at its lower end and one at its lower third, these connected bv a 
delicate impressed line. Another broken impressed line, somewhat 
parallel to the above, at a little distance outside it, connects three 
bristle-bearing punctures upon the occiput, the lower one of these 
with a distinct smooth puncture between it and the frontal suture. 
Clypeus free, smooth, elevated in front, its anterior and posterior 
margins nearly straight, the latter with two short stout bristles at 
each side, near the angle. Labrum irregularly impressed with two 
vertical grooves, and an obscure transverse connecting groove form¬ 
ing a broad letter H. Bears six bristles on the exposed surface, 
four in a transverse row, and two on the anterior margin. Frontal 
suture obtusely rounded at apex, distinctly sinuate between this 
and the point of contact with the frontal vitta. 
Antennae rudimentary and very minute, at extreme frontal mar¬ 
gin, just within end of frontal suture, at base of mandible, borne 
at the end of the shining curved tubercle. But one ocellus at 
edge of front, separated from antenna by frontal suture. Mandible 
entire at the tip, grooved at base, external groove with a single 
bristle, outer surface above the groove less distinctly so. Cardo 
small, wedge-shaped, stipes large, with a large and deep excavation 
beneath. Maxillary palpi three-jointed; basal joint wide as long, 
second joint longer than wide, uarrrowed distally, about half as 
