190 N. E. McINDOO 
for the antennal organs to function as olfactory or gustatory 
organs the secretion from these glands must pass through the thin 
chitin and must keep the outer surfaces of the organs moist and 
thus fitted for the reception of chemical stimuli. This is nice in 
theory, but there is not one iota of truth in such an assumption, 
because not one of the later investigators mentions having seen 
glands connected in any way with the antennal organs. Ruland 
in 1888 denies the presence of them, and the present writer has 
never seen anything in the antennae which he could call glands. 
Berlese (’09, p. 610) maintains that the essential feature of 
these chemical sense organs is the presence of antennal glands, 
and Comstock (’20, p. 133) quotes Berlese on this subject and 
then describes various types of hairs which have been called 
organs of smell and taste. The present writer (16) does not 
believe that insects have a true gustatory sense and regards it 
absurd to consider any form of hair capable of receiving chemical 
stimuli. 
d. Structure of tibial chordotonal organs. Schén (711) de- 
scribed and illustrated the structure and development of the tib- 
ial chordotonal organs in the honey-bee and ants. The present 
writer has carefully studied the structure of the same organs in 
the honey-bee and differs with Schén only in a few details. 
Sections through the tibiae of all three pairs of legs of workers 
and drones were made and a chordotonal organ was invariably 
found in each tibia sectioned. It lies (fig. 14, O) in the proximal 
end of the tibia, about one-fourth the distance from the femoro- 
tibial articulation to the tarsotibial articulation. This portion 
of the tibia is divided into two distinct chambers by the large 
trachea (figs. 15 and 16, 7'r). The blood chamber (fig. 15, B) 
contains only blood and the chordotonal organ (©), while the 
other chamber contains blood, muscles (MM), apodemes (A), 
nerves (NV), fat-cells (Ff), etc. In longitudinal sections this organ 
expands fan-like across the blood chamber and usually appears 
to be attached by its proximal end to the hypodermis (figs. 14 
and 19, Hyp), but in other sections where the tibia is considerably 
compressed both its proximal and distal ends are attached to the 
hypodermis on the anterior side of the leg (fig. 19). In a series 
