Descriptions of New Parasitic Hymenoptera. 



5i 



teriorly but not meeting, apex of seutellum and metascutel- 

 lum, and a triangular spot on the posterior angles of the 

 metathorax, white or yellowish-white; hind legs reddish- 

 yellow ; the first joint of trochanters, annulus on their femora 

 at base and another before apex, their tibiae, except the white 

 annulus at base and the tibial spurs and tarsi, fuscous or 

 brown ; abdominal segments one, two, three, and four, with a 

 narrow reddish-yellow band at apex, venter pale with lateral 

 blotches on each segment. 



Antennae brown-black, 34-jointed, acuminated, a little 

 shorter than the body. Mesonotum trilobed, the metathorax 

 rounded behind, nearly smooth, but under a high power lens 

 exhibiting fine, transverse aciculations ; legs rather slender, 

 the tarsi longer than tibiae, the claws pectinated ; wing hyaline, 

 the venation pale, the areolet small, oblique; abdomen linear, 

 longer than the head and thorax united, with the genital 

 sheaths large and broad. 



Hab. — Catawba Island, Ohio. 



Bred by Prof. F. M. Webster, from an unknown leaf-roller. 

 This species comes nearest apparently to M. superbus Prow, 

 but differs in the color of legs and abdomen. 



FAMILY CHALCIDID.K. 



Sub-family Pteromalin.e. 



Tribe Sphegigastrini. 



Svxtomopus Walker. 



(10) SynTOMOPUS americanus, sp. n. Female — Length, 

 2.5 mm. Bronzy-green, the occiput, pleura and metathorax 

 purplish ; abdomen, black, with an aeneous tinge ; legs, except 

 the knees, tibiae and tarsi, aeneous or metallic, tibiae and tarsi, 

 except a blotch on the hind tibiae toward base, brownish- 

 yellow or honey-yellow. Head and .thorax closely punctate 

 or squameous, head transverse, wider than the thorax ; 

 antennae, 13-jointed, the scape, except at extreme base, and 

 the pedicel, aeneous ; flagellum brown-black, subfiliform, the 



