DISTRIBUTION OF REPUGNATORIAL GLANDS 383 



Family HEMILEUCID^E 



Hyperchiria io (two pairs, viz. on 1st and 7th segments), H. sp. (Mexico), 

 Hemileuca yavapai, pamina, H. maia, H. artemis, Pseudohazis eglanterina. 



g. Lateral, abdominal, permanently everted, metameric glands, not known to 

 secrete a fluid, nor to be odoriferous. 



Family MEGALOPYGIDJB 

 Megalopyge crispata. 



h. Medio-dorsal, partly eversible glands, emitting a spray of liquid but no 

 odor(f), and colored coral-red or orange-yellow (P. auriflua), but usually in the 

 European species yelloivish. 



Family LIPARID^: 



All the species except those of Demas. 



i. A single, median, abdominal, dorsal gland, emitting a fluid attractive to 

 ants, on 7th segment ; with a pair of minute, index glands on the 8th segment. 



Family LYC^NID^E 

 All the species. 



j. Protrusile organs near the amis. 

 Myrmeleon larva (Hagen ? Dimmock). 



B. NYMPH or HETEBOMETABOLOUS INSECTS 



a. Paired, dorsal glands, on abdominal segments 1, 2, and 3. 

 Cimex lectularius (Ktinckel). 



b. The same on abdominal segment 5. 

 Lachnus strobi. 



C. PUPA OF CERTAIN BOMBYCES 



At anterior end of certain pupae, internal glands to moisten threads of the 

 cocoon for exit of moth. 



D. ADULT INSECTS 



a. Occurring on the prothorax only ; strongly repugnatorial, best developed 

 in $. 



Anisomorpha buprestoides, Autolyca pallidicornis, Phasma putidum, Phyl- 

 lium (sp.), Heteropteryx (sp. ), Diapheromera femoratum (probably in all the 

 species of the family), Mantis Carolina. 



b. Occurring on the pro- and mesothorax, and on the middle of the abdomen, 

 orange-yellow, fleshy tubercles or evaginations. 



Malachius bipustulatus, Anthocomus equestris, Evaius thoracicus. 



c. Segmental, eversible glands, homologues of the coxal glands of other 

 Arthropods, occurring on all, or nearly all, the abdominal segments. 



Scolopendrella immaculata (coxal glands on 3d to llth pair of legs), Campodea 

 staphylinus (a pair of coxal glands on 1st to 8th abdominal segments), Machilis 

 maritima (eversible, coxal glands on segments 1-7). 



