164 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



(6) P'RACKER, S. B. : The Classification of Lepidopterous Larvae. 111. 



Biological Monographs, Vol. II, No. 1, 1915. 



(7) HEINRICH and DEGRYSE: On Acrocercops strigifinitella Clemens. 



Proc. Ent. Soc. Wash., Vol. XV11, No. 1, 1915. 



(8) TRAGARDH, I: Contributions towards the Comparative Morphology 



of the Trophi of the Lepidopterous Leaf-miners. Arkir. f. Zoologi., 

 Bd. 8, No. 9., Stockholm 1913. 



(9) Contribution to the Knowledge of the Enemies of the Pine and Spruce 



amongst the Micro-Lepidoptera. Skogsvitrdsofreningens Tid- 

 skrift 1915. (Meddelandap Fran Statens Skogsfor.soksanstalt, 

 No. 12.) 



EXPLANATION OF PLATE x. 



(Schematic drawings). 



Fig. 1. Dorsal view of Head Capsule showing a typical Micro arrange- 

 ment of setae and punctures. EP. Epistoma; Ep-1, Ep-2 Epistomal 

 setae; FR Frons; Fr-l.Fr-a Frontal setae and punctures; ADF Ad- 

 frontal area of Frons; Adf-1, Adf-2, Adf-a Adf rental setae and puncture. 

 X Bend indicating forward attachment of Tenitorial Arms. Ocellar 

 area of Epicranium; AD Anterodorsal area of Epicranium; Ad-1, Ad-2, 

 Ad2a, Ad-3 Seta and, puncture of Enterodorsal area. L Lateral area of 

 Epicranium; L-l, L-la Lateral seta and puncture; PD Posterodorsal 

 area of Epicranium; Pd-1, Pd-la, Pd-2, Pd-2a Posterodorsal seta and 

 punctures. 



Fig. 2. Side view of same head showing all Epicranial areas, setae, 

 and punctures. Areas marked by dotted lines. The following seta are 

 not indicated in figure 1 : O-l, Ola, 0-2, 0-3 Setae and puncture of Ocellar 

 area; So-1, So-2, So-2a, So-3 Setae and puncture of Subocellar area; 

 G-l, G-la Genal seta and puncture. 



Fig. 3 Anterior ventral view of left Epicranial lobe showing typical 

 arrangement of Seta 0-1 and the Subocellar group. 



THE HYPERMETAMORPHISM OF THE LEPIDOPTEROUS 



SAPFEEDERS. 



BY REV. J. J. DEGRYSE, Staunton, Va. 



The habits and the structure of lepidopterpus sapfeeding larvae 

 have for many years attracted the attention of Entomologists. 

 Excellent studies on these subjects were published by Chambers, 

 Dimmock, Chapman and more recently by Tragardh. The trans- 

 formations of the sapfeeding larvae strikingly exemplify the ef- 

 fects of environmental influences, of changes in habit and conse- 

 quent use and disuse of organs. In their order of appearance 

 they constitute a noteworthy exception to the famous "recapit- 



