S08. ° NEW YORK STATE MUSEUM 
none on joint 3; anterior margin of joint 9, and of subjoint with 
a continuous row of smaller, anteriorly curved hooks; joints 7 
and 8 unarmed dorsally; ventrally joints 6, 7 and 8 have each 
four minor hooks. 
Cocoon. Length 3.5mm. Neater than that of any other spe- 
cies known to me, being formed of fine threads, lined with gel- 
atinous ones. The web is quite dense, uniform, with well de- 
fined, sometimes thickened riks. The cocoon is always securely 
fastened singly to leaf or stick, and if many are fastened on 
the same leaf, they do not crowd each other. It fits snugly 
about the pupa, which is so securely anchored inside as to be 
with difficulty extricated. 
Several female specimens taken by Messrs MacGillivray and 
Houghton at Axton N. Y. in company with S. vittatum 
agree perfectly with Coquillett’s description, though not so well 
with Riley’s. Coquillett’s description of the female in United 
States Dep’t Agric. bulletin 10, new series, reads as follows: 
Abdomen of female gray, marked with a velvet-black fascia 
on segments 3 and 4, and sometimes with two subdorsal spots 
of the same color on 2, 5 and 6; thorax bluish gray with three 
black vittae. 
The blue color on the abdomen spoken of by Riley in his de- 
scription is not distinguishable in the dried cotype specimen, 
the posterior segments appearing grayish. In the male the 
thorax is velvety black, with a few pale yellow hairs, specially 
anteriorly and posteriorly. The abdomen is velvet-black, the 
posterior margins of segments sometimes pale. The fore tibia 
possesses a single spur, the middle and hind ones each with a — 
pair [pl.38, fig.12]. All tarsal claws of the male trifid [p1.38, 
fig.18]; of the female bifid [pl.38, fig.16]. 
It may be mentioned that what Riley calls mentum I have 
termed labium. To Riley’s description of the larvae may ke 
added that the apical pair of bristles of the mandible igs not 
present or at least is not differentiated from the other hairs; 
the labrum and hypopharynx [pl]. 33, fig.11, 3] resemble those 
of other species; the labium has four pairs of setae [pl.33, fig.4], 
one of which is quite small; the maxillary palpus has no setae 
on the last joint, and but few hairs on the basal joint. No 
Spines are apparent at tip of the last abdominal joint of pupae, 
