976 General Notes. [ November, 
*is important to note that the orifice appears on two segments, for 
this indicates a repetition of the glandular organ, and is pro tanto 
a support to the view of Ray Lankester, that the coxal glands of 
Arachnids and of Limulus, are the homologues of the segmental 
organs of Peripatus. The author suggests that the gland at the 
sides of the prothorax of Avxisomorphus buprestoides, and those 
found by Scudder in the Phasmide, are possibly representatives 
of the same gland. In Mantis religiosa there is a coiled gland at 
the hinder side of the fore leg. Fourn. Roy. Micr. Soc., Fune, 
1886. 
Heart oF Insects.—Miss Olga Poletajura finds that the heart 
of Bombus is composed of five separate tubes, which form the 
chambers of the organ, and that the most anterior of these is con- 
tinued into the aorta. Each tube narrows anteriorly so as to have 
the appearance of a truncated cone, while the walls become thin- 
ner; posteriorly it enlarges ; the anterior end passes into the pos- 
terior in front, and each anterior end is so flattened laterally as to ` 
form a vertical cleft ; the cardiac tubes are thus only united with 
one another at two points; the free portion forms a duct (ostium) 
by which the blood from the abdomen enters the heart ; the inter- 
nal surface of the anterior tube, and the external surface of the 
posterior form pouch-like safety-valves which regulate the move- 
ment of the blood. The heart of Cimbex is formed in essentially 
the same way as that of Bombus. The writer points out the dif- 
ferences between the accounts now given and those of such en- 
tomologists as Strauss, Newport, and Graber, and describes the 
mode by which the heart appears to perform its function; con- 
trary to the opinion of Strauss, the first chamber does not func- 
tion alone, as the propelling agent and the ostia are not perfectly 
closed, so that part of the blood does return to the abdominal 
cavity — Zool. Anzeig., ix (1886), pp. 13-5. 
MIGRATIONS OF THE AJAX ButTeRFLY.—During the fore part 
of June, 1886, unusual numbers of the Ajax butterfly (Papilio 
accessible to them in Chicago at this point are scattered lots 
n June 12th a visit was made at Wood ogee 
IlL, a few miles south of Chicago, where the butterflies were a 
quite as plentiful, and showed the same uneasiness 1n their igh 
which, however, was only tor 
when its form would again be seen disappea 
woods. One of these specimens, after many ae 
