122 
Psyche 
[September 
possesses two of them, usually one, somewhat broader, 
lateral or proximal one and one, slenderer, medial or distal 
one; the former is according to the authors a homologon of 
the adult maxillary palp, the latter of the galea etc. of the 
adult insect. The much lower turrets of the Labium, one 
pair, situated somewhat laterally and distally of the ori- 
ficium of the labial gland on the premental part, are de- 
signed as labial palps of the larva. Both wear entrenched 
short conical sense-hairs, which apparently have a taste 
function and are connected with special nervestems and 
ganglia belonging to the gnathal brainganglion. More 
sensilla of this kind and also of the type sensilla basiconica, 
but somewhat taller and thicker-skinned, are dispersed over 
the labrum, the maxilla and the labium. . . The Antennal 
plate, a slightly convex oval plate of thickened cuticula, 
partly covering the discus antennae. Excentrically it bears 
a still more thickened plate with three sensilla of the typus 
s. basiconica. This number is constant with all the ant 
larvae I examined. Only once I saw a schencki larva with 
4 sensilla on it. . . The antennal plate of the schencki larva 
is 36 Micron in length and 30 wide; the yellowish sklero- 
tized central part measures 18 Micron (unstained total 
pr.), 18 Micron by 14 (KOH - ac. fuchsin). Proximal max- 
illary turret high 22, broad 20 Micron; distal (medial) 
turret high 31, broad 20 Micr. The shape and dimensions 
of the turrets have systematical value. Myrmicine larvae 
have no spinnerets” (pp. 34-35). “The orificium is shaped 
like a horse-shoe and is situated on the dorsal 1/3 of the 
labium, without any spinneret in Myrmica.” (p. 47). “The 
egg stage lasts (at 68-80 degrees F.) about 4 weeks, the 
larval stage 3 to 5 weeks if well-fed, but much longer — up 
to 6 months — if insufficiently fed, the praenymphal stage 
6 to 7 days and the nymphal stage 7 to 14 days. The egg, 
the newly emerged larva and the nymph require a higher 
temperature than the majority of the larvae and are usually 
carried off to drier places” (p. 39). “The hatching of the 
larva from the egg progresses as follows. At the posterior 
or caudal end the embryo separates itself from the egg- 
shell. Then the cuticula of the oral third of the egg de- 
taches itself like the lifting of a lid and the anterior part 
of the larva issues gradually. This larva I does not yet 
