. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 BULLETIISr 438, U. S. DEPARTMENT OF AGRICULTURE. THE ADULT. Female.—Length mm., very short and robust, shiny; head densely punctured, rather opaque; clypeus very slightly emarginate; frontal wanting or very slightly indi- cated; antennae very short, not as long as head and thorax, filiform, third joint longest; intercostal nfearly at right angles with costa, interstitial with basal; venation otherwise normal; stigma short, broadly ovate at base; apex of costa strongly thickened; sheath broad, slightly emarginate
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 BULLETIISr 438, U. S. DEPARTMENT OF AGRICULTURE. THE ADULT. Female.—Length mm., very short and robust, shiny; head densely punctured, rather opaque; clypeus very slightly emarginate; frontal wanting or very slightly indi- cated; antennae very short, not as long as head and thorax, filiform, third joint longest; intercostal nfearly at right angles with costa, interstitial with basal; venation otherwise normal; stigma short, broadly ovate at base; apex of costa strongly thickened; sheath broad, slightly emarginate beneath and acuminate at tip; claws simple. Color black; angles of pronotum, tegulse, trochanters, apices of femora (particularly anterior pair), tibiae, and tarsi yellowish ferruginous; the posterior tibiae and tarsi particularly some- what infuscated; veins, including stigma and costa, dark brown; wings hyaline. The females are more robust than the males. Upon issuing from the cocoon the adult cuts a small circular hole almost all the way around the end of the cocoon and issues by pushing up this "; Adults (fig. 3) fly preferably in the fuU sunshine, but also in cloudy weather. Their flight is jerky, and when captured they feign death. A great amount of time is spent running about over the unfolding leaves and buds, the antennae vibrating incessantly. They take food from the. Fig. 3.—Pear sawfly, the adult of the pear leaf-worm. Much enlarged. (Original.) nectaries of the leaves, and from observations it appears probable that they also make shght incisions with the ovipositor and suck up the moisture which collects at these wounds. (PI. I, fig. 1.) When ovipositing they run about in the same way, and at intervals the abdomen is bent down and the tip of the ovipositor inserted in the leaf, always on the under side, the leaves being mostly as yet unrolled. Sometimes the place selected appears to be unsuitable, for the ovi- positor is withdrawn after several se
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Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
