Descriptions of New Parasitic Hymenoptera. 



47 



basal joints, disks of the three imperfectly defined mesothoracic 

 lobes, metanotum and spots on dorsum of first, second, third, 

 fourth and fifth abdominal segments, brown or blackish; the 

 abdomen, except the two terminal segments, is shagreened. 

 Antennae 28-jointed, scarcely as long as the body, with the 

 flagellar joints nearly equal, from two to two and one-half 

 times as long as thick; head transverse, the cheeks convex. 

 Hab. — Wooster, Ohio. 



Bred by Prof. F. M. Webster from Rhyssematus lineaticollis 

 Say. 



Sub-family Rhogadix.e. 

 Clinocextrus Halidav. 



(4) Clinocextrus tarsalis, sp. n. Female — Length, 3 

 mm.; ovipositor not quite the length of abdomen. Brownish- 

 yellow; eyes, stemmaticum. antennae, except basal joint, all 

 tarsi, the metanotum, except apex, and usually the dorsum of 

 first abdominal segment, black. 



Head and thorax smooth, shining, with the middle meso- 

 thoracic lobe posteriorly depressed and somewhat rugulose; 

 metathorax rugose; wings hyaline, the nervures, except 

 stigma and the second branch of radius, light brown, the 

 stigma and second branch of radius, yellowish. Abdomen 

 ovate, not longer than the head and thorax united, com- 

 pressed at apex, dorsally for a little more than tw r o-thirds its 

 length, longitudinally striated, its apex smooth and shining; 

 the first segment is not quite twice as long as its breadth at 

 apex, but longer than the second; the third segment is about 

 two-thirds the length of the second ; ovipositor black, clothed 

 with sparse whitish hairs. 



Hab. — Central Ohio. 



Sub-family Blacix.e. 

 Pygostolus Haliday. 



(5) Pygostolus americanus, sp. n. Male — Length 1 mm. 

 Head and thorax black, polished ; abdomen and legs brown- 

 ish-yellow ; basal two joints of antennae and trophi, whitish; 



