﻿114 Journal New York Ent. Soc. [Voi. hi. 



tween the hinder or third pair of coxje. In Belostoma Leidy describes 

 these glands as consisting of two rather long ccecal tubes situated in the 

 metathorax, beneath the other viscera, extending backwards into the 

 abdomen, and opening between the coxce of the third pair of legs. 

 Some bugs, however, emit an agreeable odor, that of Lysomastes resem- 

 bling that of a fine bergamot pear (Siebold), The fluid given out by 

 the European fire-bug {Pyrrhocoris apterus) has a sweetish smell, like 

 ether. In the nymph there are three pairs of dorsal glands, on abdom- 

 inal segments 2-5, which are atrophied in the mature insect. In the 

 bed-bug, the nymph has three odoriferous glands, each with paired 

 openings in the three basal abdominal segments respectively; and situated 

 on the median dorsal line, being arranged transversely at the edge of the 

 tergites, but after the last molt these are aborted, aud replaced by the 

 sternal metathoracic glands (Kiinckel). 



Certain beetles are endowed with eversible repugnatorial glands. 

 Eleodes gigantea and E. deutipes of both se.xes are said by Gissler to 

 possess these glands. When teased " they stand on their anterior and 

 middle legs, holding the abdomen high up and spurting the contents of 

 the glands right and left." The glands (Plate V, Fig. i) are two red- 

 dish brown, somewhat bilobed sacs, and extend from the base of the 

 last up to the middle of the second abdominal segment, with an average 

 length of 6.5 mm. The liquid stains the human skin, has an acid re- 

 action, with a peculiar, " intensely penetrant odor, causing the eye to 

 lachrymate. It is soluble in water, alcohol and ether. Boiled with 

 concentrated sulphuric acid and alcohol an ethereal aromatic vapor is 

 produced, indicating the presence of one or more organic acids, though 

 neither formic or acetic acid could be detected. Williston has observed 

 the same habits in seven other species of Eleodes, all ejecting a pungent 

 vile-smelling liquid, one species (^E. longico Ills') ejecting a stream of 

 fluid from the anal gland, backwards sometimes to the distance of ten 

 centimeters or more, and he regards these beetles as "the veritable 

 skunks of their order." Leidy briefly describes the odoriferous glands 

 of Upls pennsylvanica. 



Glands like those of Eleodes found in Blaps inortisaga are described 

 in detail by Gilson (Plate V, Fig. 2). They form two pouches or cuticu- 

 lar invaginations situated in the end of the abdomen on the sides of the 

 end of the intestine and unite on the median line underneath the genital 

 organs, forming a very short tube with a chitinous wall, continuous 

 with the cuticle of the last abdominal segment. Into each pouch open 

 a large number of fine slender lobules varying in shape, giving a vil- 



