MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.^. 375 



ceuce, the scapo reat'liing beyond the ocelli, the i)e(licel small, aimular, 

 or rounded, the first tlagellar joint lengthened, excised one-third its 

 length at base, the following- joints shorter, the terminal joint usually 

 shorter than the second. 



Mandibles short, arcuated. 



Thorax subovoid, the pronotiim distinctly visible from above, some- 

 times lengthened, narrowed before; mesonotum with 2 deep furrows; 

 scntellum subconvex or flattened, with a large fovea at base; metatho- 

 rax short, carinated, tlie posterior angles prominent or acute. 



Front wings pubescent, Avitli a distinct basal cell and a short, open 

 marginal cell; the marginal vein is usually very short; the first branch 

 of radius short, oblique, with a slight uncus from the ti}); 9 sometimes 

 apterous or suljapterous. 



Abdonu'n ovate or conic, the petiole longer than thick, a little swollen 

 in the middle. 



Legs pubescent or pilose, the femora clavate, the tibise clavate or 

 subclavate, tibial si)urs short but distinct, the basal joint of hind tarsi 

 3 or more limes longer than the second. 



TABLE OF SPEOIES. 



Species black, or at least not entirely rii foiis or brownish 2 



Species entirely brownish or rnfons. 



Anteun.e ami legs pale brownish-yellow, the former incrassatcd toward tips, 

 the first llagellar joint not longer than the pedicel but mnch slen- 

 derer, the joints beyond moniliform, gradually increasing in size. 

 Three terminal joints palc^ jicdiccl much stouter but not longer than the first 



flagellar joint A. i;ufa, sp. uov. 



Three terminal joints black; pedicel stout«r and distinctly longer than the 

 first flagellar joint A. uufescens, sp. nov. 



2. Abdomen entirely black or only slightly pale at tip 3 



Abdomen brownish or rufous, or at least toward the base. 



Antenna' incrassated toward tii)s, moniliform, the first flagellar joint longer 

 than the pedicel. 

 Metathorax, petiole, and abdomen rufous, the second segment piceous $ ( ^ ab- 

 domen except the petiole l)lack) A. kufopetiolata, sp. nov. 



Metathorax always black, the second abdominal segment alone rufous. 



Antenna* and legs pale brownish-yellow, the first flagellar joint as long as 

 the scape, excised basally for two-tiiirds its hmgtli ^f . 



A. MissouKiENsis, ,sp. nov. 



3. Antenn;\> and legs rufous or brownish-yellow. 

 Antenna' incrassated toward tijis, sub-moniliforin. 



First flagellar joint not longer than the pedicel butslenderer. .A. conica, sji. nov. 

 First flagellar joint a little longer than th«i jiedicel and as thick, the following 

 joints trans verse-moniliform. 

 Abdoiiien bluntly rounded at tip, tlit^ petiole stout, rugose. 



A. nUGOSOPKTIOLATA, Sp. UOV. 



Antenna' liliform-moniliform. 



First flagellar joint twice the length of the pedicel; the joints after the fourth 

 trans\ erso, the last conical, twice as long as the penultimate. 

 Abdomen oblong-oval A. californica, sp. nov. 



