128 Annals Entomological Society of America [Vol. III^ 



EXPLANATION OF THE FIGURES. 

 PLATE X. 



Fig. 1. i'ront view of head of caterpillar (Apatela), with setae niunbered. I 



adf., adfrnntal scleritc; adf. j, adf. ii. its setae. i 



adf. o., adfrontal puncture. \ 



jr. i, frontal setae, fr. o., frontal puncture. ; 



cl. i., and cl. it., clypcal setae. ; 



/6r., labrum. i 



ant., antenna. i 



md., mandible, nid. i. and md. ii. its setae. 

 i to xi, setae of epicrania. 



Fig. 2. Under lip of caterpillar (Catocala). 

 S. m., Submcntum. 

 Mcnt., Mentuni. 

 m. i., mental seta. 



c, Cardo. i 



St., Stipes. , I 



i and ii. Setae of stipes. I 



iii, Seta of first joint of maxillary ])alpus. 

 mx. p.. Free ])art of maxillary jialpus. 

 (See also Figures '.\ and 20.) 



Fig. 3. Tip of labium of Catocala. 

 Seta of sclerite a. 



a. i. b., Sclerite b. perhajjs the palpifer. 



b. o., Punctures of sclerite b. 



c. 0., Puncture of sclerite c. 



seg. 1, Lb. p, sre. 3, The three joints of the labial palpus. 

 Sp. Spinneret. 



Fig. 4. Seta plan of a tyj)ical (Noctuid) caterpillar: mctathorax. In these 

 diagrams a single segment is represented as if cut on the mid-dorsal 

 and mid-ventral lines, and laid nat. The anterior edge is to the left, 

 and the mid-dorsal line at the upj^er edge. 

 Seta plan of a middle abdominal segment of the same type. 

 Prolcg of Adcla, with the setae numbered, ventral view. 

 Proleg of Ciracilaria, latcrovcntral view. 



Prolcg of Noctuid catcrjtillar, lateral view; seta viii is shown in dotted 

 lines as if seen by transparency, and the roots of the hooks are repre- 

 sented in the same way. 



Fig. 9. Arrangement of hooks on the j^rolcg of a Sjihingid or Bombycid 

 catcrjjillar 



PLATE XL 



Fig. 10. J'roleg of Papiiio polyxcnes, somewhat llattened; seen from the 



median side. 

 Fig. 11. Proleg of Ja.soniades glaucus, split do\\Ti the side to the planta and 



flattened out. 

 Fig. 12. Labrum of Acronycta, showing typical arrangement of setae, and one 



of the jnmctures. 

 Figs. 13 to 24. Labra of butterflies; drawn to the same scale. 



13. Anosia ])lexippus. 19. Ccrcyonis alopc. 



14. Argynnis cybele. 20. Pieris rapa^. 

 1.5. lui]>hydryas phaeton. 21. Paj)ilio polyxcnes. 

 1(i. Poiygonia interrogationis 22. |asoniades glaucus. 

 17 I'Ai Vanessa an tio])a. 23. Ivpargyreus tityrus 



15. Hasilarchia disij)pus. 24. Pholisora catullus. 

 Fig. 25. Labium of an Elater Ix^etle larva (compare with Figs. 2 and 32), 



