260 
by certain Braconidse, belonging to the genus Bracon, only very much 
narrower and not nearly so strong or tough. 
This new spider parasite may be recognized from the following 
description : 
Zaglyptus kincaidii, sp. n. 
Larva.— Length, 1*6 mm. In outline fusiform, widest at penultimate segment and 
gradually tapering toward the anterior segment ; width of penultimate segment, 
0*6 mm.; width of anterior segment or head, about 0*2 mm.; mandibles small, 
piceous; color pale greenish-white or milky-white, the derma being finely but beau- 
tifully shagreened; ultimate segment with two large piceous-black spots at base 
laterally, posteriorly rounded with four very minute black tubercles ; a series of 
lateral whitish spots above the spiracular region, those on, the antepenultimate seg- 
ment quite large. (Larva not fully matured. ) 
Cocoon. — Length, 7 mm. ; greatest width at the middle, 1*6 mm. ; elongate, taper- 
ing toward both ends almost equally, but tetragonal and composed of fine white 
silk closely woven into a parchment-like consistency. 
Imago. — 9- Length, 4*5 mm. ; ovipositor, 0-6 mm. Polished black, impunctate; 
mandibles, palpi, tegnlae, anterior and middle coxae and trochanters, apex of middle 
and hind femora, basal two-thirds of middle tibise, broad band on hind tibise and 
basal half of basal joint of middle and hind tarsi white; apex of hind tibise black; 
rest of legs, except middle and hind tarsi, which are fuscous, reddish-yellow; fifth 
tarsal joint swollen. 
Antennae nearly as long as the body, black or brown-black, the apical edge of 
scape and pedicel pale. Mesonotum trilobed, the lobes convex; mesopleura with a 
femoral fovea posteriorly, polished; scutellum impressed at base, subtriangularly 
elevated posteriorly, smooth ; metathorax longer than wide, delicately areolated, 
the pleura finely punctulate. Wings hyaline, strongly iridescent, the stigma and 
venation dark brown. Abdomen polished, much longer than the head and thorax 
united, with a short, reflexed ovipositor that is not longer than the first segment; 
segments 2 to 5 with a slight transverse impression and with a more or less distinct 
lateral impression ; the concave venter whitish. 
$ . Length, 4 mm. Differs from 9 only in the usual sexual difference, and in hav- 
ing the scape and pedicel beneath wholly white, the flagellum black, the middle 
tarsi sab fuscous, Avhile the surface of the metathorax is finely rugulose and dis- 
tinctly areolated. 
Habitat — Olyinpia, Wash. 
Described from one $ and one 9 specimen, bred from a spider, Tetrag- 
natJms sp., discovered by Mr. Trevor Kincaid, in honor of whom the 
species is named. 
NOTES ON SCOLYTID^ AND THEIR FOOD-PLANTS. 
By W. F. H. Blandpord, Lecturer on Entomology in the Forestry School, Eoyal Indian 
Engineering College, London, England. 
For practical purposes the Scolytidae may be divided according to 
their habits into four groups. Of these the first and most important 
is that to which the name Bark-beetles (Borfcen-Mfer) properly applies ; 
the females tunnel galleries in the inner bark or sap-wood of trees, 
from which the larvse mine separate burrows, or more rarely clear away 
