418 



PSYCHE. 



[October 1899. 



Ilab. — On tlie under siiie of the leaves of 

 Spiraea salicifolia, at Metluien, Mass., and 

 on the under side of the leaves of Prinos 

 verticillattti, at Andover, Mass., i8g8 (in the 

 woods at each place). The young begin to 

 appear about July 10 and the full grown scale 

 with ovisac the following May. The scales 

 become dry and drop oft' about the last of 

 June, none can be found in July. When I 

 sent this coccid to Prof. Cockerell last year, 

 he, then being very busy, made a hasty 

 examination of my mount and scales witli 

 ovisac. Some of the ovisacs did x\o\ have 

 any scales, and I did not state this to him at 

 that time. The mount showed the antennae 

 tube almost indentical with those of Lick- 

 tensia xnbiiyni Sign., and he supposed it to 

 be a variety of that species. Being later 

 doubtful of this, he requested me to study the 

 insect with better material, and the result 

 has been to prove that it cannot belong to 

 Lichtensia, as it does not have the scale cov- 

 ered with its ovisac. 



AuteiDial Segments. 



I 23 4567 S 



Length 56 44 SS 60 44 28 24 52 



Width So 56 36 28 24 20 20 16 



Formula 3418(25)76. 



Mcaaiwemcuts of Leg. 



the well known authority ui>on ants, wasps, 

 and bees, deserve mention. All are written 

 in the concise and clear style characteristic 

 of the author. 



In Note 17, nine classes of glandular organs 

 are defined, of which the integumentary 

 system alone comprises eight pairs: (i) 

 Unicellular glands opening separately at the 

 bases of tlie antennae. (2) Well developed 

 unicellular glands with a common reservoir 

 at the base of either mandible. (3) Maxil- 

 lary glands. (4) Labial glands, derived from 

 tlie larval silk glands. (5) Glands of the 

 median segment, possibly odoriferous to ena- 

 ble members of the same colony to recognize 

 one another. (6) Poison glands of the fe- 

 male, also .iccessory glands, alkaline in reac- 

 tion, serving— the author suggests — neither 

 to lubricate the sting nor to complete the 

 composition of the poison, but to neutralize 

 superfluous formic acid remaining upon the 

 insect itself. (7) Glands of the sheath, also 

 represented by certain glands in the male. 

 (S) Glands of the ninth segment. 



All the integumentary glands except the 

 poison glands secrete alkaline fluids which 

 are believed to protect ants from the dele- 

 terious effects of their own formic acid. 

 Thus, Janet finds that formicaries give an 

 alkaline reaction which varies in rapidity and 

 strength according to the species of ant and 



witli Tars.il Claw 



Coxa Tro- Tibia Tarsus Claws Iligi- Digi- 

 tlianler tules tules 



Length 112 264 176 84 24 60 36 



Width 140 92 44 28 28 



G. B. King. 

 Lazuieiice, Mass. 



JANET'S RECENT OBSERVATIONS 

 ON ANTS, ETC. 



Several recent papers * by Charles Janet, 



' Note 17. Systime glandulaire ti;gument.lire de la 

 Myrmica rubra. Observations diverses sur les Kourmis. 

 30 pp. 9 figs. Paris, 1S9S. 



iS. .Aiguillon de la Myrmica rubra. .A])pareil de 

 de la glaude .\ venin. 27 pp., 3 i>ls., 5 text 

 flgs. Paris, 1S98. 



Note 19. Anatomie du corselet de la Myrmica rubra 

 reine. Mi5m. soc. 200I. l-'rance, 1S98. pp. 393-450, pi. 6, 

 25 text figs. 



Extr. coniptes rend, seances acad. sc. ; — 



No. 12. Sur une cavito du tt^gument servant, chez les 

 Myrmicinae, k etaler, au contact de Pair, un produit de 

 sicrelion. T. 126 (189S), < pp. 



No. 13. Reaction alcaline des chambres et galeries des 

 nids de Fourmis. Dur^e de la vie des Fourmis decapitees. 

 T. 127(1898), 4 pp. 



14. Sur un organe uon d^crit servant .\ la fermeture du 

 reservoir du venin, et sur le Mode de fouctiounement de 

 I'aiguillon diez les Fourmis. T. .27 (.S9S). 4 pp. 



No. 15. Surle mecanisme du vol chez les Insectes. T. 

 128(1899), 4 pp. 



