COLLECTED IN BOHKEO, ETC. 43 



3. Halictus BASALis. H. niger ; alls hyalinis ; abdomine clavato, basi 

 ferrugineo. 



Male. Length 3 lines. Black : the antennae nearly as long as the 

 thorax, the flagellum fulvous beneath ; the face covered with a dense 

 griseous pubescence; the mandibles rufo-piceous. Thorax thinly 

 clothed with pale pubescence ; the wings hyaline and iridescent, the 

 nervures pale testaceous ; the tibiae and tarsi pale rufo-testaceous, the 

 latter palest. Abdomen clavate, shining and finely punctured; the 

 first segment and the apical margin of the second, ferruginous ; the 

 second and following segments with fasciae of pale pubescence. 



Hab. Singapore. 



This conspicuous insect might be mistaken at first sight for a variety of 

 " H. ceratinus," but in that species the apical margin of the fifth 

 segment of the abdomen, beneath, is straight, or very slightly emar- 

 ginate at the sides ; in the present species it is deeply emarginate its 

 entire width. 



Gen. NoMiA, Latr. 



1. NoMiA APiCALis. N. nigra, punctata; abdomine nitido, scutello 

 bituberculato ; ahs apice nigris. 



Male. Length 5 lines. Black: the head with scattered cinereous 

 pubescence, dense and short on the sides of the face ; the clypeus 

 with a longitudinal impression ; somewhat swollen on each side ; the 

 flagellum testaceous beneath. Thorax closely punctured, subopake ; 

 a line of pale pubescence beneath the scutellum, which is bituberculate ; 

 the tegulae yellowish ; the wings hyaline, the nervures testaceous, the 

 costal nervure dark brown ; the apex of the anterior wings with a large 

 dark fuscous cloud ; the legs with a glittering cinereous pubescence ; 

 the posterior tibiae curved, and dilated at their apex. Abdomen 

 shining and punctured, the apical margins of the segments depressed, 

 the apical half of the depressions impunctate. 



Hab. Singapore. 



2. NoMiA IRIDESCENS, Westw. MS. N. nigra; capite thoraceque 

 puuctatis subopacis ; faciei pube grisea ; pedibus nigris ; abdomine 

 fasciis tribus caeruleis ; alis hyalinis. 



Female. Length 4 lines. Black : very closely and finely punctured ; 

 the head and thorax with a griseous pubescence, most dense on the 

 face and sides of the metathorax ; the clypeus with a central longitu- 

 dinal carina; the mandibles obscurely ferruginous at the apex; a 

 white line on the posterior margin of the prothorax, which passes on 

 to and surrounds the tubercles ; the scutellum bordered with a line of 

 very short white pubescence ; the tegulae pale testaceous ; the wings 

 fulvo-hyaline, with the nervures pale ferruginous; the legs clothed 

 with a mixture of dark brown and griseous pubescence, that on the 

 posterior tibiae within, and on all the tarsi beneath, fulvous ; the claw- 



4* 



