1863.] 
303 
depressed, and truncated, the surface of the depressed part being sil¬ 
very-white in certain lights and having on each side a rather large, 
shallow fovea ; beneath ferruginous. Length 4 lines. 
Hah. Maine. One specimen in the Collection of Mr. E. Norton. 
Resembles var. a of H. maculata n. sp., but is at once distinguished 
by the remarkable depression of the fifth dorsal segment of the abdo¬ 
men,—a character not observed in any other species of Nomad a known 
to me. 
24. N. maculata n. sp. 
Female. Head entirely ferruginous, rather finely and densely punc¬ 
tured ; slightly hairy. Antennae about as long as the head and thorax; 
entirely ferruginous. Thorax entirely ferruginous, rather finely and 
densely punctured, slightly clothed with short pale hairs; scutellum 
subbilobate; metathorax less densely and more finely punctured, clothed 
on each side with dense silvery-white hairs ) tegulae dark honey-yellow. 
Wings subhyaline, apical margins clouded, with a pale lunule near the 
tip ) stigma ferruginous, nervures piceous. Legs entirely ferruginous. 
Abdomen minutely punctured, shining, ferruginous; posterior margins 
of the segments with an indistinct darker stain; extreme base of the 
first segment black; on each side of the middle of the first segment above 
a minute yellow spot, which is obsolete in one specimen; at the base of 
the second segment on each side a more or less large yellow spot; on each 
side of the third and fourth segments at base a yellow line, those on 
the fourth segment sometimes almost meeting on the disk; on the fifth 
segment two yellow spots close together; beneath ferruginous, immac¬ 
ulate. Length lines. Two specimens from Connecticut. 
Var. a .—Head with a more or less distinct transverse spot about the 
insertion of the antennae, sometimes another enclosing the ocelli, the 
throat posteriorly, a longitudinal line on the disk of the thorax, a spot 
or a longitudinal line on the disk of the meta thorax, a patch on the 
pleura beneath immediately behind the base of the fore feet, the inter¬ 
mediate and posterior coxas except tips, and the base of the femora be¬ 
neath, all more or less black; abdomen without yellow spots on the first 
segment, those on the second segment small, those on the third and 
fourth either subobsolete or obsolete, and the two yellow spots on the 
fifth segment distinct. Length 4—5 lines. Five specimens from Maine, 
Conn., Penn., and Delaware. 
