70 H. Friese. 



scence, 2 apical segments entirely black; venter with ochraceous pubescence, four an- 

 terior tibiae and all the tarsi black. Long, g lines (= 19 mm.).« 



2 9 von New Mexico (Yarrow), 



Das Männchen ist von Fox nicht näher gekennzeichnet, sondern nur in einer 

 Bestimmungstabelle mit dem 9 zusammen untergebracht, also wohl nicht auffallend 

 verschieden? 



Anhang. 



Arten, bei welchen die Angabe der verwandtschaftlichen Stellung vom Autor nicht an- 

 gegeben oder welche wegen oberflächlicher Beschreibung nicht sicher unterzubringen 



sind (alphabetisch geordnet). 



i3. Megacilissa clypeata Sm. 



187g. Megacilissa clypeata Smith, cT, Descr. New Spec. Hymen., pag. 5g, n. 3. 



»cT. Black, with fulvous pubescence, which is dense on the head; thorax and 

 Segment i of the abdomen, rieh above and paler on the body beneath. The clypeus 

 yellow, the scape of the antennae, the flagellum beneath and the apical Joint rufo- 

 piceous; the legs ferruginous, the posterior tibiae darkest and with fuscous pubescence 

 outside. Wings hvaline, the nervures ferruginous, the teguiae pale rufo-testaceous. 

 Abdomen having the 2. — 4. segments with their apical margins pale rufo-testaceous, 

 widely so in the middle, then narrowly and again widely so laterally; beneath rufo- 

 testaceous. Long. 7^/^ lines (= 15^2 mm.j.« 



Mexico, Oajaca. 



14. Megacilissa nigrescens Cress. 



i86g. Megacilissa? nigrescens Cresson, o, Trans. Amer. Entom. Soc, II, pag. 295. 



»cf. Black; eyes large, almost meeting in the vertex, brown; cheeks, vertex and 

 face, clothed with yellowish-white pubescence, slightly mixed with black, behind the 

 ocelli the pubescence is black; 3. Joint of antennae long and slender, knobbed at the 

 apex, sutures of remaining joints indistinctly defined and palish beneath, the extreme 

 tip slightly fulvous. Thorax covered with a very dense, short, brown-black pubescence, 

 a transverse band on the anterior margin, another between the wings, a stripe over the 

 teguiae, a mark on each side of the breast, behind the anterior femora, of whitish pube- 

 scence ; metathorax with longer brown-black pubescence and mixed with white posteriorly ; 

 teguiae piceous; wings yellowish-hyaline, the neuration same as given by Smith (Brit. 

 Mus. Catal., T. IV, F. 21) as that of Megacilissa; legs slender, brown, femora reddish- 

 brown behind, the pubescence short and pale brownish, coxae and base of femora with 

 long dark pubescence, mixed with whitish, posterior legs slender, their tibiae slightly 

 curved downward, i. Joint of tarsi flat and as long as the remaining joints together; 

 claws cleft. Abdomen shaped much as in Apis, the i., 5. and foUowing segments 

 with long pubescence, that on the former mostly white, on the latter black ish; 

 remaining segments almost nude, having a very short black pubescence, brownish 

 when viewed in certain lights, their apical margins with a narrow fascia of pure white 

 pubescence; venter flattened, piceous, paler at base, thinly pubescent. Long. 7 lines 

 (= 15 mm.).« 



I d (Coli. Gundlach), Cuba. 



