short-tongued bees of the genus Nomia. 221 
tral segments have the hairs arranged to form a semicircle 
in each. 
Pl. V. fig. 4, WV. celestina magnified; 4a, hind foot; 
4b, terminal segments of the abdomen. 
Nomia tarsalis. (Pl. V. fig. 5.) 
Parva, nigra, subopaca, crebre punctatissima, griseo- 
setosa, labro et mandibulis extus albidis, tegulis tarsisque 
brunneis, pedibus posticis incrassatis, tarsorum articulo 
basali in medio spina acuta armato, segmentis abdominali- 
bus apice tenue albido-setosis. 
Long. corp. lin. 33; expans. alar. antic. lin. 64. 
Habitat in Brasilia (Hon. D. Ellis). In Mus. Hopeiano 
Oxoniz (olim Curtis, Saunders et nostr.). 
This little bee is at once distinguished by the structure 
of the basal joint of the posterior tarsi; it is black, finely 
punctured, and moderately clothed with grey pubescence ; 
the small square upper lip, and outside of the mandibles, 
dirty white; the antenne are black; the abdomen is 
ovate, being gradually pointed to the tip, convex, and 
with the transverse impression near the extremity of each 
dorsal segment scarcely defined, the apical margin being 
glossy and sparingly clothed with a row of short grey 
hairs. The legs are black, with the tibize and _ tarsi 
pitchy: the hind femora more chestnut on the inside ; 
these are swollen above, and with a broad dilatation near 
the base on the underside ; the posterior tibiz are clavate, 
slightly excavated and setose on the inner edge between 
the middle and extremity; the basal joint of the hind 
tarsi is two-thirds of the length of the tibia, compressed, 
with a deep emargination on its underside between the 
middle and apex ; its upper angle produced into a sharp 
tooth. 
Pl. V. fig. 5, Nomia tarsalis magnified; 5a, the hind leg. 
— >. Monta, nov. gen. 
Mandibule parvee graciles, dente interno instructe. 
Maxillz elongate, palpo 6-articulato. 
Mentum gracile, subcylindricum, lingua apice lato 
bifido, membranaceo-setoso, utrinque lobo laterali instructa. 
Palpi labiales minuti, 4-articulati. . Antenne articulo 
lmo parvo, apicali in mare dilatato compresso. Pedes 
postici satis graciles, tibia intus dense setosa; tarsi graciles. 
Cellulee submarginales 2da et 3tia in alis anticis fere 
eequales. 
