HAZEL CATERPILLARS. 639 



Supra-anal plate very short and broad, rough on the surface, with four fine terminal 

 hairs. Prothoracic segment edged iu front with bright yellow, succeeded by five 

 yellow transverse interrupted lines, consisting of two transverse elongated dorsal 

 spots and two placed obliquely on the side. A broken yellow line on the side of the 

 prothoracic segment. 



Larva after anoth<'r molt. — Length, 24 to 25™™. Body as before, but deep lilac. 



After final molt. — With the same markings; pale lilac, with the head very large, 

 rounded, and much wider than the body. Length, 35™™. 



7. Nepticnla corylifoUella Clem. 



The larva makes a long, winding, narrow track in the leaves of 

 hazel in the latter part of July and the beginning of August, and the 

 fall brood may be found early in October. The frass or excrement of 

 the larva is deposited along the middle of the track, forming a minute 

 central black line. The edges of the mine are smooth and but little 

 broader throughout its extent than the width of the miner. I'he 

 mine is left transparent by the larva from the beginning to the end. 



There is another miner in this leaf that I suspect to be a Dipteron. It 

 makes a rather broad, tortuous track, much broader than the preced- 

 ing, and the " frass " is scattered in separated grains along the middle 

 of the track. , 



8. Coleophora corylifoUella Clem. 



The larva mines the leaves of hazel in September and October. The 

 case is three lines long, dark brown, irregularly cylindrical, compressed 

 or flattened at its hinder end, with two teeth about the middle of the 

 upper edge, separated from each other about one-third of the length of the 

 case, and dilated somewhat or rounded on the lower edge between the 

 teeth. Mouth of case not deflected. The mine of the larva is nearly 

 circular. 



Larva. — It is pale brown with dark brown thoracic, dorsal spots, 



9. Depressaria grotella Robinson. 



The caterpillar lives on the hazel in Illinois, " in a leaf rolled from 

 the apex toward the base, or in a nest formed by fastening several 

 leaves together with silken threads." Of two found May 27, one 

 pupated June 7, and the moth issued June 28 ; another pupated June 

 20 and the moth issued July 9. 



Larva.— Body green, darkest dorsally; cervical shield green, unmarked, head 

 green, with a black dot on each side above the jaws, and sometimes with one or two 

 black spots on each side near the top. Length, 17™™. (Coquillett, Papilio, iii, p. 98. ) 



10. Gelechia tristrigella Walsingham. 



The caterpillar of this moth lives on the hazel in a tube formed by 

 rolling a leaf from the apex toward the base, the tube being closed 

 at each end, as if done by pinching the upper and lower part of the 

 tube together with the thumb and finger. The excrements of the larva 

 are retained in the tube, and when about to pupate the larva crawls into 

 this excrementitious mass and forms an oblong cavity, which it lines 



