218 
Megachile rittneri. 
3 — black, with the anterior legs ferruginous; their coxae 
armed with an acute black tooth; a dark stain on the femora 
and tibiae behind, the tarsi dilated and fringed behind with 
very pale curled pubescence. The face covered with dense 
yellowish withe pubescence; on the thorax above it is thinner, 
shorter and brighter; wings hyaline, with a faint cloud at their 
apical margin ; the metathorax has a cinereous pubescence. 
Abdomen; the segments fringed with pale fulvous pubescence 
the margin of the apical segment emarginate, the emargination 
denticulate. — Long. 6 l / 2 lines (= 1372 mm )- 
In this species the head is a little wider than the thorax 
and narrowed behind the eyes.« 
Bei Yarkand, im Mai. Ost-Turkestan. 
179. Megachile rittneri D. T. 
1853. — Megachile canescens Smith, Catal. Hymen. Brit. Mus. I. p. 155 
n. 29 [nec. Brüllt]. 
1896. — Megachile Ritttneri Dalla Torre. Catalog. Hymen. X. p. 446. 
»3. — Black, the lace densely covered with pale ochraceous 
pubescence, on the vertex as well as on the disk of the thorax 
it is sparingly scattered and fuscous; on the entire insect beneath 
the pubescence is long and hoary, very dense on the head 
beneath; the sides of the thorax covered with hoary pubescence; 
the wings fusco-hyaline; the anterior tarsi not dilated and the 
anterior coxae unarmed, the tarsi beneath fulvous, claws ferru¬ 
ginous, black at their tips, the calcaria pale testaceous. 
Abdomen short, very convex, the margins of the segments 
having laterally a white marginal fringe, continuous on the 5. 
and 6. segments, the apical segment notched in the middle 
and crenulated at the sides. — Long. 4 lines (= 872 mm )- 
Obs. This is probably the 3 of M. albopicta. Algeria. 
180. Megachile sculpturalis S.m. 
1853. — Megachile sculpturalis Smith, ^ Catal. Hymen. Brit. Mus.I. p. 181 n.108. 
»?. — Black, the face above the clypeus as high as the 
stemmata covered with black pubescence; the clypeus ruggedly 
sculptured, truncate in front; its anterior margin transverse, the 
mandibles stout and armed with 2 teeth, the apical one long 
and acute. The thorax, legs and basal segment of the abdomen 
covered with fulvous pubescence; wings fusco-hyaline, much 
clearer and yellowish towards the base, nervures ferruginous. 
