June, ’20] 
AINSLEE: CORNPITH WEEVIL 
277 
I quote herewith the description of the adult given by Blatchley and 
Leng (1916): 
“Oval or subrhomboidal, feebly flattened above. Piceous-black, densely clothed 
with narrow, pointed, dull yellowish scales, those of thorax arranged transversely, 
those of elytra forming two or three nearly regular rows on each interval; each elytron 
usually with three submarginal dark spots on apical two-thirds, one or two of these 
sometimes almost or wholly wanting; beak, antennae, tibiae and tarsi dark reddish- 
brown. Beak slender, compressed, half as long as body, finely striate-punctate on 
sides, polished and almost impunctate above. Antennae inserted just beyond basal 
third; second joint of funicle slender, nearly as long as the next two, the latter equal. 
Thorax one-fourth wider than long, sides feebly converging from base to middle, then 
broadly rounded to near apex, which is subtubulate; disc densely and rather coarsely 
punctate, slightly carinate at middle. Elytra at humeri distinctly wider than thorax, 
thence narrowed to the conjointly rounded apex; sculpture hidden by scales. Length 
3.5-3.8 mm.” 
DESCRIPTION OF LAST INSTAR LARVA BY A. G. BOVING 
Family Characters 
Larva hypognathous (with mandibles directed vertically ventrad and posterior end 
of cardo attached near the occipital foramen). Body subcylindrical, soft skinned, 
with deeply plicate segments; three thoracic and ten abdominal segments present; 
tenth abdominal segment small, wartshaped. Legless. Labrum free, movable. 
Mandibles without molar part. Maxilla with single large maxillary lobe; stipes 
behind maxillary lobe united with a large, fleshy, simple subfacial area which is con¬ 
tinuous with prothorax. Buccal cavity without hypopharyngeal chitinization. 
Tentorium forming a broad and strong bridge. 
Generic and Specific Characters 
Head somewhat inserted into prothorax; cranium, when liberated, slightly longer 
than wide. Epicranial suture half as long as cranium; lateral epicranial carina curved, 
viewed from above subparallel with outline of cranium, extending posteriorly to end 
of epicranial suture; each epicranial half with six setae, arranged as shown in fig. 10, 4. 
Ocelli two, first ocellus anterior and inferior, placed near antenna, twice as large as 
second, posterior and superior ocellus, the position of which is about midway between 
first ocellus and lateral epicranial carina (fig. 10, 2). Frons about as long as epicranial 
suture; frontal sutures diverging about 120°; strong median frontal carina; three small 
setae on anterior frontal margin, two long and one small setae on frontal plate, arrange¬ 
ment and relative size as shown (fig. 10,4). Antennae very small, two jointed, basal 
joint not much higher, but considerably wider than apical joint, with five small setae 
and one sensorial puncture (fig. 10, 6). Clypeus transverse, about four times as wide 
as long, glabrous. Labrum transverse, anterior margin convex, extreme length medi- 
anly about as long as clypeus, width about three times greater than length; dorsal 
face of labrum (fig. 10, 4) on each side with three long, slender setae; anterior marginal 
face (fig. 10,1) on each side with a lateral group of three setae and a median group of 
two; ventral face or epipharynx on each side with two setae, one anterior and thick, 
the other posterior and fine and placed inside anterior end of epipharyngeal rod. 
Mandible subtriangular (fig. 10,1) somewhat larger at base than apically; inside con¬ 
cave, gouge-shaped; distally with five teeth, external tooth on each side small; one small 
seta. Maxilla with glabrous cardo; stipes proper carrying one long seta (fig. 10, 7); 
palpiger with two setae of different length; single maxillary lobe (or mala) ventrally 
with five well-developed setae (fig. 10, 7), dorsally, toward buccal cavity with seven 
