24 AMERICAN HYMENOPTERA. 



prominent whitish band across anterior margin of clypeus and side pieces; eyes 

 much farther apart above tiian their greatest length ; ocelli with a smooth sliining 

 spot beliind, a little less than the distance of the length of antennal joints 3-4 from 

 eye-margin ; scape of antennse yellow tipped, third joint shorter than 4-5 com- 

 bined ; clypeus not dentate, evenly rounded ; mandibles piceous. Thorax black, 

 witli collar, anterior portion scutellum, post-seutellum, tegulffi, tubercles and spot 

 behind pale yellowish white, a whitish growth of fine hair below and posteriorly ; 

 mesothorax strongly and closely punctured, more finely so at edges; scutellum 

 smooth, shining centrally, large punctures posteriorly; post-scutellum more finely 

 punctured ; metathorax rugose, smooth, shining, on elevation, which is divided 

 by suture; suture strongly cross-wrinkled. Abdomen with large, sparse punc- 

 tures; not hairy; black with yellow patches on segments 1-3 forming bands on 

 4-5, very wide on latter, segment 6 subquadrate as in 4-notatus, a deep narrow 

 emargination at sides, claspers as in A-notatus ; venter smooth, shining, immacu- 

 late, a few hairs and punctures. Legs black, tibia yellow outwardly and strongly 

 spincd. Wings clear, stigma and nervures ferruginous, a light spot before stigma. 

 %i . — Length 9-11 mm. Two specimens show yellow on face confined to side 

 pieces, while one specimen shows a band somewhat as in 9.. but shorter and 

 narrower and confined to middle lobe. The latter also shows a spot on posterior 

 angles of metathorax; mandibles yellow spotted outwardly (eyes farther apart 

 than their greatest length) ; otherwise like 9 • 



Hab. — New Mexico, Arizona. Two males, Las Cruces, New Mex., 

 Ckll. 872, Ckll. 5090 ; one % locality not specified ; 9 Arizona. 

 On Bigelovia wrightii in the Mesilla Valley, New Mexico. Also at 

 Rincon, New Mex. (Prof. Cockerell). 



This species shows some little variation in the size and number of 

 punctures. 



Apliilsiiithopxi <|ii»(IriiiotRiiis Ashm. 



Aphilanthops quadrinotatus Ashmead, Bull. No. 1 Col. Biological Asso. 1890, p. 7. 

 9-- — Length 8-10 mm. Black and rufous with pale yellow markings. Head 

 black, covered with a short growth of silvery hair, vertex closely and finely 

 punctured ; greatest distance apart on vertex equal to four-fifths of length of eyes ; 

 ocelli the length of second and third antennal joints fi'om eye-margin, no smooth 

 spot behind ; lower half of clypeus and side pieces yellowish, sometimes rufous, 

 very slightly margined with black, not dentate; mandibles reddish yellow, black 

 tipped ; scape yellow, flagellum rufous, third antennal joint as long as two fol- 

 lowing. Thorax black, with an interrupted line on collar, anterior margin of 

 scutellum. scapula?, post-scutellum, oblong spot on lateral angles, tegulge. tuber- 

 cles and spot behind, all yellowish, with a short growth of silvery hair thicker 

 below ; mesothorax, scutellum and post-scutellum closely and finely ])unctured ; 

 metathorax more roughly punctured. Abdomen as long as head and thorax, finely 

 and irregularly jninctured ; a few silver hairs above longer and thicker poste- 

 riorly, rufous, with a black band on margin of segments 3-4 and 4-5: segments 

 1-3 with oblong spots (last often forming an interrupted band), a band on 4 and 

 5, all pale yellow; sixth segment flattened, concave, subquadrate, ridged cen- 

 trally, not marked ; claspers obtuse and just protruding beyond segment 6. flat 

 tened ; venter sometimes darkened apically, a few hairs and a few large punctures. 

 Legs rufous, tarsi darkened. Wings hyaline, not clouded, stigma and nervures 

 fuscous, the former darker and with a light spot before. 



