12 THE ENTOMOLOGIST. 



closely ; head and thorax with very pale ochreous hair, white on 

 lower part of pleura, light fulvous on sides of metathorax, on meso- 

 thorax and scutellum strongly mixed with dark fuscous ; eyes strongly 

 converging below ; clypeus finely rugose, it and the supraclypeal area 

 with a longitudinal carina ; front densely punctured ; hair on anterior 

 part of cheeks shining silvery ; antennae long, black, basal half of 

 flagellum with a poorly defined red band beneath ; scutellum moder- 

 ately bigibbous ; metathorax shining, the basal area smooth, with a 

 fine transverse raised line separating the apical part ; tegulse pointed 

 behind, testaceous with a large piceous patch ; wings faintly dusky, 

 more strongly so on apical margin ; nevures and stigma dusky 

 ferruginous ; first r. n. joining second s. m. beyond middle ; legs black, 

 with pale hair, reddish on inner sides of tarsi ; hind femora moder- 

 ately swollen, flattened beneath ; hind tibiae thick, trigonal, strongly 

 curved, the broadly truncate apical lobe light yellow, stained at end 

 with ferruginous ; hind basitarsus pallid on outer side near base ; 

 abdomen more or less metallic, with purple tints, very strongly 

 punctured, with broad tegumentary bands (occupying much more 

 than half of the apical depression) on segments two to five ; in the type 

 the last two are iridescent, with brilliant emerald green and purple 

 colours, while the other two (doubtless abnormally) are dull greenish ; 

 in a second specimen they are all dull greenish ; penultimate seg- 

 ment with a dentiform lobe on each side ; apex very broad, emar- 

 ginate. 



2 . Similar, but more robust, with the usual sexual differences ; 

 abdominal bands three, green without purple ; hind femora beneath 

 with a curled fulvous scopa, but scopa of hind tibiae white ; flagellum 

 bright ferruginous beneath except at base ; mesothorax and scu- 

 tellum with most of the hair black or dark fuscous ; scutellum with 

 a median groove ; basal sulcus of metathorax rather faintly beaded 

 laterally ; abdomen not so strongly punctured as in the male. 



Hah. Takao, Formosa, August 18th, 1907, one female. The 

 female approaches N. iridescens, Smith, but is much larger, with 

 very much larger punctures on the two basal segments of 

 abdomen. The closest affinity is with N. chalybeata, Smith, 

 which differs in the colour of the thoracic pubescence. The 

 insect may be regarded as the Formosan representative of 

 N. chalybeata. The type is a male. 



Group C. 



Postscutellum unarmed ; abdomen with hair-bands ; tegulae not 

 enlarged. 



Nomia mediorufa, n. sp. 



$ . Length about 8 mm. ; black, with the flagellum (dusky in 

 middle above), the basal two-thirds or more of the first abdominal 

 segment, the knees, the anterior tibise (with a large dusky cloud) and 

 the tarsi ferruginous ; pubescence of head, thorax, and legs fulvous, 

 nowhere becoming white ; head transversely suboval, eyes strongly 

 converging below ; face covered with appressed pale fulvous hair ; 



