. Smithsonian miscellaneous collections. nd of trochanter belonging to right hind leg of is, passing through group 6 of olfactory pores (4 pores on right) andgroup 5 (3 pores at left). Ap, pore aperture, Bl, BIockI ; Co, chitinous cone;GC, hypodermal gland cell; Hr, noninnervated hair; A^. nerve; Po, pore ofhypodermal gland; SC, sense cell; SF, sense fiber; and Tr, trachea. 50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 but the other so-called olfactory organs, which are nothing morethan ordinary innervated hairs, are common only to the antennae ofthe adult, although similar innerva
. Smithsonian miscellaneous collections. nd of trochanter belonging to right hind leg of is, passing through group 6 of olfactory pores (4 pores on right) andgroup 5 (3 pores at left). Ap, pore aperture, Bl, BIockI ; Co, chitinous cone;GC, hypodermal gland cell; Hr, noninnervated hair; A^. nerve; Po, pore ofhypodermal gland; SC, sense cell; SF, sense fiber; and Tr, trachea. 50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 but the other so-called olfactory organs, which are nothing morethan ordinary innervated hairs, are common only to the antennae ofthe adult, although similar innervated hairs are also found on otherparts of both adult and larva. In the adult the olfactory pores werefound on the head capsules, legs, elytra, wings, and mouth parts, andat the base of the antennae; in the larva, on the head capsule, baseof antennae, mouth parts, clypeus, and second thoracic segment. Theindividual and sexual variations found in the pores were small, al-though the females have per cent more pores than have K^ ^ PB ;^p PW Fig. it.—External view of single olfactory organs and noninnervated hairson larva of Cotinis nitida, X 320. A, 4 organs from trochanter, showing poreborder {PB), pore aperture (Ap). and pore wall (PJV). B, 2 organs and a hairfrom hypopleural region ; C, 2 organs from maxilla; D, 2 organs and a hairfrom labrum; E, 2 organs from labium; F, 2 organs and a hair from epicranium;and G, a hair from first antennal segment. On the larva of the green June beetle (Continis nitida L.) the writer(44) foimd the olfactory pores unusually numerous and consisting oftwo types. The single olfactory organs are isolated pores, not arrangedin groups. They were found on the antennae, all mouth parts, headcapsule, thorax, and legs, and average 1,359 pores per individuallarva. This number is slightly more than the total number of poresfound on the elytra, wings, and legs of an adult of the same external anatomy is unusual in that the pore
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