. Smithsonian miscellaneous collections. 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
. Smithsonian miscellaneous collections. 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 border (fig. 11,PB) is radially striated, while the border around the hairs nevershows striae. The compound olfactory organs (fig. 12) are variouslyshaped plates, each of which bears many apertures. They were foundonly on the distal halves of the last antennal segments. Figure 13illustrates the internal anatomy of the single and compound organs. NO. 18 SENSE ORGANS OF COLEOPTERA—McINDOO 51. Fig. 12.—External view of compound and single olfactory organs and olfactorypegs on distal half of last antennal segment of larva of Cotinis nifida. A, 9 com-pound organs and 3 single ones on ventral side of antenna, viewed from a flatsurface, X 100; 2 of the compound organs at extreme tip are not shown. B, 6compound organs, 4 single ones, and i group of olfactory pegs (Pg) on dorsalside of antenna, viewed from a flat surface, X 100. C. external view of a com-pound and a single organ, X 320; the small circles represent pore apertures.
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
