58 HYMENOPTERA. 



third and fourth segments a fascia of white downy pubescence, 

 interspersed with long pale hairs, the apex of the abdomen ful- 

 vous ; beneath, the segments are smooth at their base and punc- 

 tured towards their apical margins, which are more or less testa- 

 ceous. 

 Hab. Hunter River, Australia. 



71. HALICTUS SPHECODOIDES, n. s. B.M. 



Female. Length 2 lines. Head black, with a green hue in 

 some specimens, the flagellum nigro-piceous beneath, mandibles 

 ferruginous at their apex. Thorax black, the disk green ; the 

 tegulae pale testaceous, nervures ferruginous, the stigma fuscous ; 

 wings subhyaline, beautifully iridescent ; the anterior tibiae, the 

 knees of the intermediate and posterior pairs, and the tarsi, fer- 

 ruginous ; the anterior tibiae frequently black or fuscous above. 

 Abdomen ferruginous, smooth and shining, the base black ; 

 sometimes the apex fuscous. 

 Hab, New Holland. 



72. HALICTUS CARBONARIUS, n. s. 



Female. Length 4 lines. Jet-black, head rather finely ru- 

 gose, the clypeus having large deep punctures. Thorax shining, 

 strongly, but not very closely punctured ; the enclosed space at 

 the base of the metathorax has a short rugose striation, the me- 

 tathorax truncate, the truncation smooth and shining; wings 

 slightly fusco-hyaline; legs clothed with dark fuscous pubescence, 

 the floccus nearly white. Abdomen elongate-ovate, closely and 

 finely punctured, the apical margins of the segments smooth and 

 shining, the anal rim a fuscous, margined with black pubescence. 

 Hab. Sydney, New South Wales. (Coll. F. Smith.) 



73. HALICTUS ORBATUS, n. s. 



Female. Length 3 lines.- Black, head very minutely and 

 closely punctured, the clypeus coarsely punctured and ciliated 

 with fulvous hairs, thinly covered with pale pubescence. Thorax 

 thinly clothed with pale pubescence, the disk strongly punc- 

 tured, the enclosed space at the base of the metathorax covered 

 with radiating rugose sculpture ; the wings hyaline, their 

 extreme base, the nervures and tegulse pale testaceous ; the 

 tibia? and tarsi covered above with silvery white pubescence, 

 tarsi beneath pale fulvous, apical joints of the tarsi ferru- 

 ginous. Abdomen globose, shining at the base, finely and closely 

 punctured, the margins of the segments narrowly rufo-piceous, a 

 patch of white pubescence at the base of the second segment 



