MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^, 191 



Prosacantha nana, a\>. iiov. 



9. Leugth, 1""". Black; thorax finely rugose, subopaque, the 

 scutellnui smooth, shining, faintly punctate; head smooth, shining, 

 the face polished, very sparsely, finely punctate above. Mandil)les 

 black. AntenujB 12 jointed, black, the pedicel two-thirds the length 

 of the first funiclar joint, the second funiclar joint slightly shorter than 

 the first, the third and fourth, minute, transverse, club as long as the 

 funicle, excluding the pedicel, the joints transverse. Postscutellar 

 spine very minute. Wings subfuscous. Legs black, the tarsi fuscous. 

 Abdomen longer than the head and thorax together, polished, the first 

 segment and the second basally, striated. 



Habitat.— Utah Lake, Utah. 



Type in Coll. Ashmead. 



Described from a single specimen, received from Mr. E. A. Schwarz. 

 Prosacantha caraborum, sp. nov. Riley. 

 (PI. VIII, Fig. 4,9.) 



" 9 . Length, 1.8'""'. Black, shining, the thorax finely rugulose, the 

 scutellum almost smooth. Head transverse, thrice as wide as long, the 

 occiput longitudinally striated, the fsice smooth with a delicate carina 

 extending from the front ocellus to the base of the antenn;ie; lower part 

 of orbits and cheeks Avith strire converging toward the mouth; mandi- 

 bles pale rufous, deeply bifid at tips; antenme 12-jointed, about as 

 long as the body, slender, dark brown or black, the sca])e a little pale 

 at extreme base; pedicel about as long as the third funicular joint; the 

 first and second funicular joints elongate, equal, about twice as long as 

 the pedicel, the fourth subequal with the third; club 0-jointed, slender, 

 long, fusiform. Metanotum with silvery pubescence; teguhe black; 

 wings hyaline, the venation pale brownish-yellow. Legs reddish-yel- 

 low, the coxa^ basally and the middle and posterior tibi;ie and tarsi, 

 fuscous. Abdomen as long as the head and thorax together, shining, 

 Avith a spars(% fine i^ubescence toward the apex; the first three seg- 

 ments longitudinally striated. 



'' S . Smaller (1.6'""') and remarkable for the very long, filiform, 

 hairy antenna^ which are fully twice the length of the whole insect; 

 they are black, the scape rufous, the pedicel round; the flagellar joints 

 all exceedingly long and slender, longer than the scape, the third being 

 angularly produced toward the base." — [From Eiley\s J/<S'.i 



Habitat. — Washington, D. C, and Arlington, Va. 



Types in National Museum and Coll. Ashmead. 



Reared by Dr. liiley in -Tunc, 1881, from the eggs of a Carabid beetle 

 {ChUvnius impimctifroHs), and also taken by me in \lrginia by sweep- 

 ing. 



