. Bulletin. les, which average about three-fourths 62 inch in length. The males are readily distinguished by the black, curvedstylus or spine projecting upwards at the tip of the abdomen, sometimes,however, pressed to the body and more or less inconspicuous. , The egg. pure white when first laid, gradually becomes pale flesh-color and finally cream-color or pale brown. It is elliptical in form,averaging for the species under discussion mm. in length and .5 thickness (Fig. 2). Only the head of the larva protrudes when hatching begins (Fig. 3),but gradually the egg-shell splits longit
. Bulletin. les, which average about three-fourths 62 inch in length. The males are readily distinguished by the black, curvedstylus or spine projecting upwards at the tip of the abdomen, sometimes,however, pressed to the body and more or less inconspicuous. , The egg. pure white when first laid, gradually becomes pale flesh-color and finally cream-color or pale brown. It is elliptical in form,averaging for the species under discussion mm. in length and .5 thickness (Fig. 2). Only the head of the larva protrudes when hatching begins (Fig. 3),but gradually the egg-shell splits longitudinally, exposing the body ofthe larva (Fig. 4). The body is pure glistening white and shows nocharacteristic markings, the segments being indistinct even in the maturelarva (Fig. 5, and PI. Ill, Fig. 1, 2). The cocoon is oval, or egg-shaped, covered with soft, flufify silk ofa tan or golden brown color, and averages from 15 to 25 mm. in length(PI. Ill, Fig. 4, and PL IV, Fig. 8, 9). Beneath the outer downy. Fig. 2. White-grub showing position ofTiphia eggs; a, Tiphia punctntnRob., b, T. transversa Say, andeggs much enlarged. covering are several more compact and firmer layers, capable of protect-ing against unfavorable soil conditions, such as excessive moisture. The method used by the writer in studying the details of the life ofTiphia is very simple, and the cage was an ordinary three-ounce tinsalve box. Two grubs, put in opposite sides of each box, were coveredwith soil, and properly watered. These preparations were made in ad-vance of the introduction of the parasite to enable the grubs to makecells, which would give more normal conditions for the Tiphia. Afemale Tiphia was then introduced into the box and the grubs wereexamined for eggs every few hours if very exact records of oviposition 63 were desired. When a grub bearing an egg was found it was immediate-ly transfered, with soil, to an ounce tin-box, which was then filled to thevery top with soil so as to enable the
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
