APIDiB. 
347 
Halictus grisescens, Schenck, = punctatissimus, Schk. ; H. albiduSj 
Schk., nec Lep., is re-named albidulus ; IT. parumpimctatus, Schk., ? = 
semipunctatus, Schk., $ ; IT. gracilis, Mor., == lucidulus, Schk. ; Prosopis 
sinuatus, ?, Schk., = clypearis, Schk., $, and TTylmus floralis, blandus, 
angulatus and siculus, Forst., are varieties of the latter ; IT. xanthocnemis, 
(Bmulus,foveolatus, incongruus and nigriceps, Forst., = confusus,Piy\.', TT. 
schenclci and annulatus, Forst., = annularis, K. ; IT. gredleri, fumipennis 
and rubicola, Forst., and ? Prosopis pygmcea, Schk., = brevicornis, Nyl. ; 
Andrena tschelci, Mor., = bicolor, Nyl., nec F. (clarkella, K.) ; A.fallax, 
Schk., nec Evers., is re-named flavilabris ; and varfous observations 
are made on allied species found in Nassau ; Schenck, B. E. Z. xviii. 
pp. lGl-170. Halictus pygmams, Schk., 1853, nec 1861, = lucidulus, Schk., 
1861, $ [the name pygmceus must stand, and the subsequent species of 
the same name requires re-naming] ; Andrcena hirtipes, Schk., nec Pz., 
re-named sguamigera\ A. mixta, Schk., is a middle form between varians 
and helvola, K., of which angulosa, K., is the $ ; observations are also 
made on various allied species found in Nassau, and on Spherodes, Ilalic- 
toides, Dufourea, Ilhopliitcs, and Ilyhms, not capable of condensation. 
Id. tom. cit. pp. 337-340, 345-347. 
Colletes caspicus, sp. n., Morawitz, 1. c. p. 174, Derbent. 
Hylceus scutellaris, p. 176, Bacu, rugicollis, p. 177, Derbent, id. 1. c., 
spp. nn. 
Sphecodes distinguendus, p. 39, brevicornis, p. 40, variegatus, p. 41, 
spp. nn., Von Hagens, B. E. Z. xviii. (? Cleves). 
Halictus tricinctus and bicinctus, p. 161, canescens, p. 162, Schenck, 1. c. 
Wiesbaden; H. patellatus, p. 162, fallax, p. 163, caspicus, p. 164, ripa- 
rius, p. 165, bicallosus, p. 166, coloratus, p. 167, pulvereus, p. 168, 
meridionalis, p. 170, semitectus, p. 172, cepJialicus, p. 173, Derbent, 
Morawitz, 1. c. ; TT. trizonatus, E. T. Cresson, Tr. Am. Ent. Soc. v. p. 
101, Nevada : spp. nn. 
Agapostemon melliventris, sp. n., Cresson, 1. c. [? N. America ; no 
locality mentioned]. 
Nomia nevadensis, sp. n., id. ibid., Nevada. 
Nomioides jucunda, sp. n., Morawitz, 1. c. p. 161, Derbent. 
Andrena nobilis, p. 158, Derbent, dentiventris, p. 160, Curusch, id. 1. c. ; 
A. alho-picta, Kadoschkowsky, to7n. cit. p. 192, Erivan: spp. nn. 
Aindes. 
O. de Bourmeister Radoschkowsky [‘ Bourmeister-Radosczkowsky ’ in 
Index], Bull. Mosc. xlviii. pt. i. pp. 132-164, continues his “ Supplement 
indispensable,” discussing species of his second sub-division ‘ Megachi - 
leoides,’ and carrying the idea as to the importance of the structure of 
the maxillary organs [Zool. Rec. x. p. 348] so far, as to establish a 
mathematical diagnostic formula applying to them (p. 154). References 
are made to 55 figures of palpi, &c., contained in pi. i. op. cit. xlvii. 
Megachile ai'gentata, Lep., nec F., = pacijica, Panz., of which 2 males 
are noted with a spur to the hooks of anterior tarsi ; M. vestita, Gir., nec 
Smith, is re-named giraudi (p. 137) ; Chalicodoma lefevrii, Gerst., = 
serrata, Sm., = albocristata, Sm. ; an un-named Megachile ? from France, 
