338 Trans. Acad. Sci. of St. Louis. 



median line more elevated, space on metathorax more rugose, 

 wings clearer, second submarginal cell longer, receiving 

 second recurrent farther from apex, abdomen black in three 

 specimens before me. Length 9-10 mm. 



£. Besides the characters common to both sexes, differs 



from the male of preceding in its clypeus being more flat, the 

 sixth segment broader above and beneath, the angles of the 

 latter more strongly reflexed and more evident above. 

 Length 9 mm. 



Wellesley, Mass. (A. P. Morse) ; 3 §, 2 $, specimens. 



Mackopis Panz. 

 Macropis morsel 



$. — Black, shining, clothed with thin pubescence which is 

 pale except on the mesonotum, where it is blackish and on 

 tarsi beneath where it is more or less fulvous; middle of 

 face rather closely punctured, vertex on each side of ocelli 

 smooth, shining and impunctate; the clypeus, a small spot 

 on each side in the lower corner of the face, and sometimes a 

 spot on base of mandibles yellow; apex of mandibles rufous; 

 flagellum dull testaceous beneath, fourth joint of antennae 

 about one-half as long as third, fifth about as long as third 

 and fourth together and a little shorter than following 

 joints; mesonotum shining and rather sparsely punctured; 

 base of metathorax shining and impunctate; wings subhya- 

 line, nervures, stigma and tegulae dull testaceous, second 

 submarginal cell receiving recurrent nervures near base and 

 apex, narrowing about one-half above; legs blackish, joints 

 2-4 of tarsi ferruginous, hind tibiae simple, quite different 

 from those of M.dliata and patellata; abdomen shining and 

 impunctate, apical margins of segments depressed, second and 

 following segments with thin fasciae of whitish pubescence; 

 ventral segments smooth and shining, apical margins nar- 

 rowly pale testaceous and wholly without ciliae. Length 7 



mm. 



o_. — Resembles the male, more sparsely punctured ; tibiae 

 exteriorly with pale pubescence, less evident on anterior pair, 

 long dense and white on posterior pair ; basal joints of tarsi 

 fuscous above, ferruginous beneath, more black on posterior, 



