THE CANADIAN ENTOMOLOGIST, 151 



Pupa bright orange-scarlet, with a pair of prominent anterior projec- 

 tions. 



Female 2280//. long, of which 500/x is ovipositor; antennae 16-jointed, 

 the joints practically sessile ; length of antennas about 730/* ; wing 1530/7. 

 long (but the ? varies in size, a small one having the wing only 1360, a 

 large one as much as 1785); thorax small, only 425/x long. Thorax black 

 or almost ; legs and antennae pale ; abdomen in life bright scarlet. 

 Wings normal ; angle formed by third vein, and margin above scarcely 

 short of a right angle ; distal part of third vein faint. Fringe very long, 

 some of the hairs exceeding 170/*. 



Male. — Differs by the longer legs and the cylindrical brown 

 abdomen ; claspers stout, obtuse. The femora measure in //. : anterior, 

 830; middle, 800; hind, 1000. Antennae 16-jointed; middle joints with 

 bulb about 60/x, and pedicel 40 ; the hairs on bulb about 140. Scutellum 

 prominent in both sexes. 



In Dr. Felt's table (N. Y. State Mus. Bull. 124) it runs to the group 

 of R. antennarice and R._ alticola, but is distinct from these. R. alticola 

 is common in Colorado, making a quite different sort of gall, on Artemisia 

 Canadensis. 



Another new species of Rhopalomyia, collected at Boulder, will be 

 described by Dr. Felt. 



TWO NEW BEES OF THE GENUS PERDITA, VISITING 

 BAILEYA IN NEW MEXICO. 



BY T. D. A. COCKERELL, BOULDER, COLORADO. 



Perdita baileyte, n. sp. 

 £. — Length, about 6^4 mm.; head and thorax shining dark bluish- 

 green (vertex dull and yellower green), with copious white hair ; eyes dull 

 pea-green ; cheeks unarmed ; mandibles (except tips), labrum, clypeus 

 (except the usual dots, and more or less of the upper edge) and lateral 

 marks all creamy -white; lateral marks filling the space between clypeus and 

 eye below, but ending abruptly just below level of upper edge of clypeus, 

 except for a very fine streak which runs a short distance up the orbital 

 margin ; antennae pale yellow basally and orange apically, the scape black 

 above, and the first few flagellar joints more or less ringed with blackish 

 above; upper edge of prothorax, tubercles, and spot on the hyaline tegulae, 

 cream-colour ; pleura without light markings ; wings milky hyaline, stigma 

 light yellow, nervures white ; marginal cell with the poststigmatal portion 



May, 1909 



