382 TEXT-BOOK OF ENTOMOLOGY 



Distribution of repugnatorial or alluring scent-glands in insects 1 



A. LARVAL INSECTS 



a. Each thoracic segment ; sternal. Phryganea grandis. 



b. Prothoracic, sternal, discharging a lateral jet of spray with a single large 

 internal sack. 



LEPIDOPTERA 



Family TINEID.E 



Hyponomeuta evomjmella. 



Family NOCTUID.E 



Bryophila, Cucullia formosa, C. scrophuiariw, Habrostola, Clenphana Una- 

 rice, Catocala (sp.), Aporia cratwyce, Aplecta nebulosa, Leucania staminea, L. 

 hispanica, L. nonagrioides, Plusia gamma. 



Family NOTODONTID^E 



Pheosia rimosa, Schizura concinna, Danima Banksii (Australia), Macruro- 

 campa marthesia, Heterocampa pulverea, Centra vinula, C. furcula, C. borealis, 

 C. multiscripta. 



Family NYMPHALIDJE 

 Probably all the species. 



c. Prothoracic, dorsal ; sending out a V-shaped odoriferous organ (osmete- 

 riuui). 



Family PAPILIONID.E 

 All the species as a rule. 



d. Thoracic sternal, evaginable glands. 



Family PEROPHORID^E 



Lacosoma chirodota, Perophora melsheimerii. 



Family NOLIDJE 

 In three, and probably in all the species of Nola. 



e. Lateral, abdominal, non-eversible glands, one near each spiracle, emitting 

 a clear fluid. 



Family TENTHREDINID;E 



Crcesus septentrionalis , C. varus, Cimbex americana, C. betulce, Trichiosoma. 



f. Lateral, abdominal, partly eversible glands emitting neither moisture not 

 odor, but flesh-colored. 



Family TINEIDJE 

 Phyllocnistis ? (eight pairs.) 



1 Embryonic or temporary glands, the " plenropodia " of Wheeler, viz. the modi- 

 fied first pair of abdominal legs, occur in CE^anthus, Gryllotalpa, Xiphidium, Steno- 

 bothrus, Mantis (occasionally a pair on tlie second abdominal segment, Graber) ; 

 Klatta, Periplaneta. Cicada, Zaitlia, Hydroiliilus, Acilius, Melolontha, Meloe, Sialis, 

 Neophylax. (See Wheeler, Appendages of the First Abdominal Segment, etc., 1890.) 



