PROC. ENT. SOC. WASH., VOL. 20, XO. 2, FEB., 1918 



33 



pany this paper and to Dr. Boving for his valuable criticism 

 and suggestions. 



ARTICLES REFERRED TO IN THIS PAPER 



(1) BARNES AND MCDUNNOTJGH: Check List of the Lepidoptera of Boreal 



America, 1917. 



(2) BUSCK, A.: On the Classification of the Microlepidoptera. Proc. 



Ent. Soc. Wash., Vol. XVI, No. 2, June 1914. 



(3) BUSCK AND BOVING: On Mnemonica auricyanea Walsingham. Proc. 



Ent. Soc. Wash., Vol. XVI, No. 4, 1914. 



(4) DEGRYSE, J. J. : Some Modifications of the Hypopharynx in Lepidop- 



terous Larvae. Proc. Ent. Soc. Wash., Vol. XVII, No. 4, 1915. 



(5) HEINRICH, CARL: On the Taxonomic Value of Some Larval Characters 



in the Lepidoptera. Proc. Ent. Soc. Wash., Vol. XVII, No. 3, 

 1916. 



(6) MEYRICK, E.: Exotic Microlepidoptera. Vol. I, Part 13, Oct. 1915. 



(7) MEYRICK, E.: Revision of New Zealand Tineina. Transaction New 



Zealand Institute, Vol. XL VII, 1914. 



(8) SPULER, A.: Die Schmetterlinge Europas, 2 Band 1910. 



(9) TRAGARDH, I.: Contributions towards the Comparative Morphology 



of the Trophi of the Lepidopterous Leaf-miners. Arkiv. f. 

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



EXPLANATION OF PLATES 



ADF, Adfrontal area of frons. 



ADFR, Adfrontal ridge. 



AT, Antenna. 



BL, Blade-like posterior dorsal 

 region of Epicranium. 



Br, Brush of hair-like spines on 

 Lacinia of Maxilla. 



C, Cardo. 



Cn, Spined cone on dorsum of man- 

 dible (Opostega). 



Cnd, Mandibular condyle. 



DrT, Dorsal arm of tentorium. 



E, Epicranium. 



(A-l, A-2, A-3, Aa, O-l, O-2, 0-3, 

 SO-1, SO-2, SO-8, SOn, I'-l, P-2, 

 Pb, G-l, Ga, Epicranial setae 

 and punctures.) 



EP + PLK, Epistoma and pleuro- 

 stonia . 



ES, Epipharyngeal shield. 



ET, Epipharyngeal setae "teeth" 

 of Opostega). 



EX, Epipharynx. 



F-l, Fa, Frontal setae and punc- 

 tures. 



FR, Frons. 



Fs, Epicranial fossa for mandible. 



G + Lc, Galea and lacinia of max- 

 illa. (Including the Maxillary 

 lobe [MxLb] and Brush [Br.] of 

 Lacinia). 



GL, Transparent gula between 

 ridges of hypostoma. 



///, Endoskeletal ridge of hypo- 

 stoma. 



Hp, Triangular plate of hypostoma. 



L, labrum. 



LP, Labial palpus. 



LtR, Lateral ridge of epicranium. 



M, mentum. 



