314 



Explanation of Plates. 



Plate LXXXVIII. 



Plate LXXXIX. 1. 



Plate LXXXVI. Micropteryx ammanella, <$, to show the per- 

 manent exsertion and massive structure of 

 the male appendages. 

 Plate LXXXVII. End of abdomen of Eriocrania semipurpiireUa 

 to show the contrast with Micropteryx and 

 the apparent ostium, o, on the 8th abdominal 

 segment. 

 Portions of heads with mouth parts of 

 imagines of (upper) Micropteryx allionella, 

 and (lower) M. seppella, both x 100. 

 In both the maxillary palpi are broken off — a 

 portion of one is seen at top of upper photo- 

 graph ; the maxillae with lacinia and galea 

 are fairly seen in both figures, the man- 

 dibles best in the lower one. The letters 

 refer : a. antenna, g. galea, I. lacinia, Ibr. 

 labrum, tp. labial palpi, mn. mandible, mx. 

 maxilla, st. stipes, marked at position where 

 palpus broken off. 

 Larva of M. calthella in first instar X 100, 

 head, strongly exserted by pressure ; the 

 three legs and eight false legs are well 

 seen. 



2. Larva of M. calthella in second instar, X 100, 

 head retracted ; the positions of the skin 

 appendages are well seen. 



3. Last segments of larva of M. allionella, x 25, 

 show something of the skin appendages 

 and the two terminal bristles. 



1. Larva of M. catthetla second instar, X 75. 



2. Micropteryx catthetla, larva in second (third ?) 

 instar, x 50, head retracted; the skin texture 

 and appendages are seen. 



3. Micropteryx calthella, larva in last instar, only one 

 that spun a cocoon and died therein, X 25. 



Micropteryx calthella, portions of larva in first and 

 second instars, X 250, showing skin appendages. 

 Micropteryx calthella, heads of two specimens of first- 

 stage larva, X 250, showing antennae and mouth 

 parts, and in one specimen a leg enters the picture 

 and some skin texture is seen. 



Plate XC. 



Plate 

 Plate 



XCI. 



XCII. 



