. Bulletin of the Department of Agriculture. Agriculture. Fig. 7.—Third-instar larva of the Mediterranean fruit fly: a, Lateral view of entire larva; 6, dorsal view of anterior portion; c, lateral view of same; d, ventral view. (Original.) trunks extending the full length of the body. The posterior stigmatic plates, the outer edges of which are about mm. apart, have two instead of three slits, as illustrated in figure 9, a. The mandibles or mouth hooks are not conspicuous and are of the shape indicated in figure 10, a. Second larval instar.—In size the second larval instar is suffic
. Bulletin of the Department of Agriculture. Agriculture. Fig. 7.—Third-instar larva of the Mediterranean fruit fly: a, Lateral view of entire larva; 6, dorsal view of anterior portion; c, lateral view of same; d, ventral view. (Original.) trunks extending the full length of the body. The posterior stigmatic plates, the outer edges of which are about mm. apart, have two instead of three slits, as illustrated in figure 9, a. The mandibles or mouth hooks are not conspicuous and are of the shape indicated in figure 10, a. Second larval instar.—In size the second larval instar is sufficiently large to be dis- tinct from the first instar, but not from undersized third-instar larvae. It may, how- ever, be easily distinguished from the third instar by the shape of the anterior spiracles. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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