222 The Philippine Journal of Science 1920 
Nomia tuberculifrons sp. nov. 
Female . — Length, a little over 10 millimeters; black, with 
four rather broad, very bright, emerald green bands (slightly 
tinged with red) on abdomen ; legs ferruginous, with pale fulvous 
hair ; wings dilute reddish fuliginous, the second submarginal cell 
large and square; supraclypeal area with a strong elevation or 
tubercle, representing the lower end of the frontal keel ; clypeus 
shining, sparsely and not strongly punctured, reddish apically, 
depressed in middle, wholly without a keel, but with a low ele- 
vation or boss on each side; head and thorax with pale fulvous 
hair; mesothorax and scutellum with thin inconspicuous hair; 
mesothorax dullish and practically impunctate, except the disc 
posteriorly, which is shining and evidently punctured; scutel- 
lum slightly bigibbous, the bosses shining; postscutellum un- 
armed; tegulse fulvous. Antennae strongly reddened on under- 
side. Hair of abdomen above, except basally, black, but on 
underside pale fulvous. 
Borneo, Sandakan, 2 females. This belongs to a little group 
of species which includes N. elegans Smith, N. borneana Cam- 
eron, and N. erythropoda Cameron. Nomia elegans differs 
by the hyaline wings and blue-green abdominal bands. (A 
specimen from Celebes, standing in the British Museum as N. 
elegans, differs from Smith’s description, having the abdominal 
bands yellow-green shot with vermilion.) Nomia borneana, 
based on a female collected by Shelford, differs by the hyaline 
wings with pale nervures, but agrees in the tubercle on face. 
Cameron says that borneana is close to elegans, which may be 
known from it by the clypeus being coarsely punctured, sub- 
tuberculate on each side, and with a central longitudinal de- 
pression. Our insect has the clypeus as here described for 
elegans, except that it is sparsely and not very coarsely punc- 
tured. Nomia erythropoda, based on a male from Kinghang, 
has no bright-colored band on first abdominal segment; the 
wings are hyaline, with the radial and cubital cells smoky; the 
lower part of front and face are keeled in the center. Accord- 
ing to Meade-Waldo, erythropoda and borneana are the same 
species. 
The following key will be useful for the separation of the 
Bornean species of Nomia: 
Wings dark violaceous; female, 12 millimeters long (Kuching). 
violaceipennis Cameron. 
Wings hyaline or smoky (fusco-violaceous at apex in robusta) 1. 
