124 E. T. CRESSON. 



MegacUile addenda. — $. — Form broad; black, shining, closely and 

 finely punctured ; face, apex of clypeus and cheeks rather densely clothed with 

 griseous pubescence, long on cheeks beneath, on the vertex the pubescence 

 is sparse, short and black; clypeus shining, strongly punctured; mandibles 

 rugose, fringed beneath with long yellowish hair; thorax clothed with griseous 

 pubescence dense on metathorax and pleura; mesothorax almost nude, having 

 a scattered black pubescence on disk, the anterior and lateral margins with 

 pale pubescence; tegulae piceous; wings tinged with dusky, darker on apical 

 margin; legs with short pale pubescence, that on tarsi beneath dense and 

 yellowish; abdomen minutely punctured, clothed with short black pubescence, 

 segments 2 — 5 rather deeply transversely depressed towards base and fringed 

 at apex with a short dense white pubescence, first secernent clothed with griseous 

 pubescence; apical segment densely punctured, slightly excavate on each side 

 before tip; ventral scopa dense and white, the last segment with short black 

 hair. Length .62 inch. 



■J. — Face and clypeus with long dense yellow pubescence; the pubescence 

 of thorax behind and beneath longer than in 9 and tinged with ochraceous; 

 legs slender, the pubescence long, the tarsi which are simple fringed beneath 

 with long yellowish pubescence, anterior coxae each with a rather long black 

 spine; abdomen narrower than in 9> similarly sculptured and ornamented, 

 but with longer pubescence on first segment, sixth segment depressed, promi- 

 nent on basal middle, the apex transversely compressed and deeply emar- 

 ginate in the middle, forming two broad slightly divergent teeth coarsely 

 serrated on the edge; apical segment with a large acute central tooth and 

 a short one on lateral margin; ventral segments fringed at apex with long 

 whitish pubescence. Length .45 — .50 inch. 



Hah. — Mass., N. J., Ga., 111., Col., Tex. Sixteen specimens. This 

 resembles hucephala, but is much smaller, the head of 9 smaller, the 

 abdominal segments more deeply transversely depressed, etc. 



Megacliile iiioutivaga. — 9- — Form rather narrow; black, opaque, 

 densely punctured ; face, sides of clypeus and cheeks with rather dense whitish, 

 and the vertex with black pubescence; clypeus coarsely punctured; thorax 

 behind and beneath with dense whitish pubescence, on mesothorax it is short, 

 sparse, and black; wings tinged with dusky, dark on apical margin; legs with 

 short pale pubescence, the tarsi slender, clothed beneath with yellow pubes- 

 cence; abdomen with subparallel sides, finely not closely punctured, segments 

 2 — 4 with a transverse deeply impressed line near base, and together with 

 the fifth segment fringed at apex with short white pubescence; sides of first 

 segment clothed with long pale pubescence; apical segment very densely, 

 minutely punctured, covered with a dense ochraceous pile; ventral scopa 

 yellow. Length .50 inch. 



%. — The pubescence much longer and more dense, especially on face and 

 clypeus where it is yellow, on vertex and mesothorax it is long and black; 

 tarsi simple, slender, rufo-testaceous beyond first joint, anterior coxse without 

 spines; sixth segment of abdomen concave, with a slight prominence on basal 

 middle, the apex transversely compressed and more or less emarginate medially ; 

 apical segment with a carina or short blunt tooth on each side and one on the 

 middle. Length .35 — .45 inch. 



Ilab. — Colorado, (Ridings, Morrison). Twenty specimens. 



