ICIINEUMOMD.^. 109 



tinate; abdomen subpetiolate, depressed, oblong-ovate, polisbod, ferruginous ; 

 first segment longitudinally acicuiate, gradually dilated to the tip, with two 

 well-defined, longitudinal carinse on the middle, not reaching the tips, the stig- 

 matic tubercles prominent and situated about the middle. Length 33 lines. 

 ^((6.— Connecticut. (Coll. Mr. E. Norton.) One 9 specimen. 



T. subcrassus.— "S ?. Robust, black, shining, thinly clothed with a pale pu- 

 bescence; clypeus more or less ferruginous; most of mandibles and palpi, yel- 

 low; antennpe as long as head and thorax in 9> longer in % , reddish-brown, 

 dusky at tips in 9 > black in %, scape beneath yellowish; thorax densely and 

 finely punctured; mesothorax with no longitudinal impressed lines; metatho- 

 rax with well-defined elevated lines, posterior truncation rugulose and bounded 

 by a sharply defined carina; tegulpe and nervui-es at base of wing yellow- 

 ish-white; wings hyaline, nervures and stigma black, the latter conspicuously 

 yellowish white at base, areolet petiolated, obliquely triangular; legs in- 

 cluding the coxae, ferruginous, two anterior pair at base and in front yellowish, 

 tips of posterior femora, of their tibise and of their tarsi more or less dusky; 

 claws pectinate; abdomen subsessile, oblong-ovate, subdepressed, ferruginous, 

 or yellowish-ferruginous, the base and apex generally more or less black ; some- 

 times the lateral margin of the basal segments are blackish, and sometinies the 

 carinse on the first segment are black, while the remainder of the segment is 

 about as long as its apical breadth, with two well-defined, central, longitudinal 

 carinse on the basal half. Length 3 — 3^ lines. 



iJaJ.— Mass., Conn., Pa. Five specimens. Closely allied to dimidialas, but 

 the legs are less robust, and the sculiJture different. 



T. occidentalis. — 9 . Robust, black, shining, thinly clothed with pale pubes- 

 cence; front slightly prominent; face, clypeus, lower part of cheeks, mandi- 

 bles, except tips, and palpi, pale lemon-yellow ; antennoe longer than head and 

 thorax, pale fulvous, dusky at base, scape yellowish beneath ; mesothorax not 

 impressed longitudinally ; pectus beneath, spot on each side of pleura beneath, 

 tegulse and nervures at base of wings pale yellow; scutellum with a shallow 

 fovea at tip and a deep, transverse excavation at base; metathorax rugulose, 

 with sharply defined elevated lines, forming an elongate, subquadrate, central 

 area, posterior truncation bounded by acute carinse; wings hyaline, iridescent, 

 nervures and stigma blackish, the latter conspicuously whitish at base, areolet 

 petiolated, triangular, scarcely oblique ; legs ferruginous, the two anterior pairs 

 yellow at base and in front, tips of posterior femora, of their tibite and of their 

 tarsi, dusky; claws pectinate ; abdomen subsessile, subdepressed, shining, fer- 

 ruginous, the three apical segments above black; first segment about as long as 

 its apical breadth, its dorsal middle with a blister-like elevation, with two cen- 

 tral longitudinal carinse at base; second segment transverse, with a transverse 

 impression near apex; venter yellowish, especially at tip. Length 33 lines. 



J3ra6.— Illinois. (Coll. Mr. E. Norton.) One specimen. 



T. frontalis.— 9 . Black, shining; face, spot on each side of vertex at sum- 

 mit of eyes, clypeus, mandibles, palpi, and spot beneath eyes, lemon-yellow; 

 antennae longer than head and thorax, fulvous, blackish at base above and be- 

 neath ; mesothorax slightly gibbous anteriorly; scutellum prominent, mostly 

 lemon-yellow 5 tegulse, spot in front, and base of wing nervures, pale yellowish; 

 metathorax rugose, with tolerably well-defined elevated lines, posterior portion 

 scarcely truncate; wings hyaline, iridescent, nervures blackish, areolet sub- 

 j)etiolated, oblique, nearly longitudinal ; legs ferruginous, the two anterior pairs 



