CHARLES W. METZ. 135 



P. cBnigvnis Vier. so far as can be told by the description, 

 (Insects of Beulah, New Mexico), certainly belongs to P. 

 episcopalis. It is described as differing by, "disc of meta- 

 thorax rugose, with no large, shining pits as in episcopalis ". 

 which character is utterly valueless for separation. Similarly 

 P. universitatis Ckll. is only differentiated upon minor differ- 

 ences in the face marks, shade of fiagellum, and black collar 

 (Ann. and Mag. Nat. Hist. Ser. VIII, 17:225). This is 

 probably the variety subtristis. 



PROSOPIS FOSSATA n. sp. 



Male. — Easily distinguished by its large size, coarse, confluent punc- 

 turation over head and thorax, fossa and grooves of propodeum, long 

 narrow basal segment of abdomen, and entirely dark collar. 



Length about 6-7 mm. Slender; scape moderate, concave laterad ; 

 flagellum very long, light beneath ; face long, narrow ; clypeus less 

 than half as broad at base as at apex, equal in width to lateral areas 

 at base ; thorax slender, flattened ; propodeum long ; posterior face 

 not clearly outlined ; abdomen slender, first segment almost conical. 



Sculpture. — Practically entire body except abdomen, coarsely, rugo- 

 sely, confluently punctured. Front, vertex and occiput with confluent, 

 rugose, striate punctures, extending down onto cheeks. Prouotum 

 confluently punctured over entire surface ; mesoscutum coarsely, con- 

 fluently punctured, almost rugose over entire surface ; scutellum simi- 

 lar but disc more sparsely punctured ; metanotum rugose, almost 

 pitted. Enclosure of propodeum abnormal ; entire bowl on superior 

 face, lateral margins not curved but straight, in form of ridges, con- 

 verging to a large, deep fossa which takes the place of the usual neck ; 

 bowl entirely covered with irregular pits ; laterad of the apex of the 

 bowl are deep, irregular grooves, or excavations, running into the 

 fossa, below which are more irregular, very deep pits extending over 

 the posterior face and onto the sides of the propodeum ; the margin 

 of the posterior face is bordered by a high, sharp, irregular ridge ex- 

 cept at top of fossa where it arches over. Mesopleura with large, 

 deep, irregular, confluent punctures, almost pit-like, varying in size 

 and shape and separated by sharp ridges ; metapleura depressed ven- 

 trad, short, broadened above, margins becoming indistinct among 

 the coarse punctures. Abdomen absolutely impunctate, first segment 

 glossy, and rufous, remainder dull black. 



Yellow Markings. — Face marks strongly resembling those of P. epis- 

 copalis, (fig. 105), but lack yellow on labrum and mandibles. The 

 only thoracic marks are spots on the tubercles. Legs with front of 

 fore tibise, base and apex of other tibiae, and all tarsi yellow. 



TRANS. AM. ENT. SOC. , XXXVII. 



