Excerpt from Entomological News, Vol. 8
The larva is footless and quite thickly covered with hairs. The ventral surface of each thoracic segment is somewhat swollen and more densely hairy than elsewhere on the body, with many of these hairs longer than the others. General color whitish, with slight yellowish tinge. Head white, labrum and mandibles yellow, tips of mandibles black; the skin is much wrinkled and folded as illustrated in figure a. Eight spiracles are plainly to be observed; the thoracic segments show but one spiracle, which is situated in the fold between the first and second segments. On the lateral aspect, near the middle of each of the first seven abdominal segments, is situated a spiracle just above an oblique fold in the skin. See figure a.
Pupa. - Length 5.5 mm.; width of head just cephalad of eyes .85 mm.; width of body across the mesothorax 2 mm. Color white throughout except the eyes, which are brownish. Head is bent down against the ventral surface of the prothorax; each segment is marked with two pairs of rather prominent lines, the lines of each pair curving in, meeting each other at the distal extremity of the wing-cover. The distal end of each elytron bears an outward curved, brownish colored hook; numerous hairs are distributed over the abdomen, dorsal part of the thorax and the head. Under a two-thirds objective, the skin is seen to be thickly covered with minute spine-like protuberances.
In all specimens examined the cast larval skin remains quite firmly attached to the caudal part of the abdomen. See fig. b.
Adult. - "Robust, elytra with a series of alternate gray and black spots. Body short and thick, densely hairy, brownish cinereous; head plane not prominent between the eyes; antennae moderate, pale rufous, three last joints fuscous, thorax with a few black spots, elevated line of the posterior margin not prominent, placed near and parallel to the posterior edge; elytra with punctured striae, alternate interstitial lines, with alternate black and gray spots; feet rufous; thighs dusky; tibiae with about two dusky bands. Length three-twentieths of an inch." See figure c.
Life History Notes.
Abundant specimens were secured and brought to the laboratory for study. Specimens were placed in several different glass jars and uninfested corn or cow-peas were supplied them.
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