276 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



ISORHOMBUS ForHtcr. 

 Hyin. Stud., ii, ]>. 107 (185fi). 



Head transverse, the vertex flattened, the oeeij^nt witli a sharp mar- 

 gin j ocelli 3, triangnlarly arranged, the lateral far away from the 

 margin of the eye or nearer to the front ocellns than to the eye margin. 



Antenna' inserted just al)ove the clypens, 10-jointed in both sexes, in 

 9 terminating in a o-jointed club, in S with a 5 jointed club, the joints 

 of which are longer than thick, the first fnniclar joint very minute. 



Thorax ovate, the prothorax distinct, the mesonotum much longer 

 than Avide, with furrows, the scutellum subconical or subj^yramidal, end- 

 ing in a little si^ine at tip, and more or less pubescent, the metathorax 

 short, with a median carina. 



Wings Avhen folded extending to, or a little beyond, the tip of the 

 abdomen, jmbescent and vdnless. 



Abdomen long, in $ pointed-ovate, in S oblong-oval, the first seg- 

 ment longer than wide, the second very large, occupying fully two- 

 thirds of the whole surface. 



Legs clavate, the basal joint of hind tarsi twice as long as the settond. 



Distinguished by the 3-jointed club in the female, the shaiie of the 

 scutellum, the long mesonotum, and the position of the ocelli. 



Isorhonibus hyalinipennis Asliiu. 



(PLxn, 2,<?.) 

 Can. P^ut., XIX, p. 1129 ; Cress. S\ n. Hym., p. 249. 



9. Length, 1.5""". Black, shining, in»i)unctured, the occiput alone 

 finely transversely acicidated; antenme, exce])t the 3-jointed club and 

 legs, brownish-yellow or yellow; the coxie and club black. Head trans- 

 verse, the lateral ot-elli about their width from the border of the eye, 

 the mandibles and palpi j^ale or yellowish. 



Antennie 10-jointed; scape subclavate, as long as the pedicel and 

 funicle united; pedicel not quite as long as the first and second funiclar 

 joints united; second funiclar joint very little longer than the first; 

 third and fourth small, transverse; fifth much wider, transverse; club 

 3-jointed, black, the joints loosely joined, the first two sulxjuadrate, 

 very slightly serrate toward one side at apex, last joint oblong. Tho- 

 rax convex, without furrows or only slightly indicated posteriorly, the 

 little lobe thus formed projecting slightly upon the scutellum. Scu- 

 tellum subconvex, foveate<l at base and with only a slight tubercle at 

 tip, the tubercle being subobsolete. Metathorax and petiole subpu- 

 bescent. Wings hyaline. Abdomen ovate, depressed, jwlished, im- 

 punctured, the petiole scarcely as long as wide. 



$. Length, 1""". Differs only in the antenme, the club being 5- 

 joinled, pale, the first and third funiclar joints small, the second being 

 stouter and about thrice as long as thick. 



Habitat. — Jacksonville, Fla. 



Types in Coll. Aslimead. 



