HAZEL CATERPILLARS. 637 
Order Hemiptera. 
46. Clastoptera sp. 
47. Lachnus alnifolice Fitch. 
48. Schizoneura tessellata Fitch. Alder blight ; 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 r 
and the remainder Diptera and Hemiptera, with the exception of a 
single saw-fly. 
1. Apatela falcula Grote. 
The caterpillar has been found on the hazel by Mr. Coquillett Septem- 
ber 25 j 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 sinuate, 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 mm . Il- 
linois. (Grote, Can. Ent., ix, p. 86.) 
2. Amphypyrapyramidoid.es var. conspersa Riley. 
The following account, copied from his note-book, has been given 
me by Professor Eiley : 
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 
