HAZEL CATERPILLARS. 637 



Order Hemiptera. 



46. Clastoptera sp. 



47. Lachnus alnifolice Fitch. 



48. Schizoneura tessellata Fitch. Alder blight j common from Maine 



southwards. 



49. Lygus monachus (Uhler.) See. p. 420. 



INSECTS INJURIOUS TO THE HAZEL. 



Corylus americana. 



Little attention has been given to hazel insects in this country, as the 

 shrub is not of economic importance. Kaltenbach enumerates ninety- 

 eight species of insects (including one mite) which occur on the Euro- 

 pean hazel ; of these twenty-four are beetles ; fifty-nine are Lepidoptera, 

 and the remainder Diptera and Hemiptera, with the exception of a 

 single saw-fly. 



1. Apaiela falcula Grtote. 



The caterpillar has been found on the hazel by Mr. Coquillett Septem- 

 ber 25 ; it entered the earth and spun a thin cocoon September 29, the 

 moth appearing May 25 of the same year. 



Larva, — Body dark brown, mottled with pale greenish; a dark dorsal line, on each 

 side of which are two rows of prickles, most distinct on the anterior part of the 

 body ; the four prickles on top of segment 11 are larger and placed closer together 

 than those on the segments anterior to it ; from each of these prickles proceeds one 

 or two short black hairs. Body beneath greenish white. Side of the head pale 

 greenish, the face brownish; length, 1.25 inches. (Coquellett, Papilio, i, p. 6.) 



Moth. — Allied to A. tritona and grisea. The external margin is sinnate, not straight,, 

 sweeping inwardly below the apices and bulging opposite the median nervules. 

 Forewings dark purple gray, very like tritona. A black basal dash, lined above with 

 pale, furcate. Internal margin at base, with a patch of light brown scales. Ordi- 

 nary spots concolorous, faintly outlined ; orbicular spot larger than in tritona. Me- 

 dian shade obsolete; median space very wide. Transverse anterior line evident 

 above the basal dash (which slightly exceeds the line) and here blackish ; beneath 

 the dash, obsolete. Transverse posterior line shaped as in tritona, but without the 

 discal incision ; blackish, subdentate, edged outwardly with brown, inwardly with 

 whitish. Black dash on submedian fold not extending within the line. Hind wings 

 whitish at base, outwardly vague and largely blackish. Forewings beneath, fus- 

 cous; hind wings whitish, with a faint discal spot and external sinuate macular 

 band. Thorax like the forewings, edged on the sides and behind with light brown. 

 Body beneath, whitish ; abdomen above, light gray. Expanse of wings, 35™™. Il- 

 linois. (Grote, Can. Ent., ix, p. 86.) 



2. Amphypyra pyramidoides var. consperaa Riley. 



The following account, copied from his note-book, has been given 

 me by Professor Riley : 



Found the forepart of July, 1867, by Bolter, on hazel-nut. Length, 1.3 to 1.5 

 inches. Color, beautiful emerald green, the palpitations visible, but no particular 

 markings either on head, body or foot other than the stigmata formed by a black 



