THE CANADIAN ENTOMOLOGIST 27 



In 1916 (Ann. Mag. Nat. Hist., June, p. 432) I described a 

 new genus Austrodioxys, with the species A. thomasi from the 

 Argentine. It has in general the characters of Brachynomada, but 

 there are only two submarginal cells. Ducke intimates that two 

 submarginal cells may occur as an abnormality in Brachynomada; 

 but there is no reason for doubting that the specimen of A. thomasi 

 is normal. 



I have before me, from the U. S. National Museum, a small 

 bee collected by Prof. L. Bruner at Carcarana, Argentina. Ash- 

 mead examined it and referred it to the North African genus 

 Schmiedeknechtia Friese. It is, however, of the Brachynomada 

 type, and since it has only two submarginal cells, it ought to go 

 in Atistrodioxys. Unfortunately, however, the second submarginal 

 cells receive both recurrent nervures, whereas in Austrodioxys the 

 first submarginal receives the first recurrent. In Austrodioxys it 

 must be the first transverse cubital which has dropped out, but in 

 the Bruner specimen rather the second. Under these circumstances 

 it will probably be best to consider Austrodioxys a subgenus only, 

 its type becoming Brachynomada thomasi (Ckll.). The Carcarana 

 insect may be described as follows: 



Brachynomada subminiata, n. sp. 



9 . — Length about 7 mm., anterior wing 5; head and thorax 

 black, strongly punctured; the face, upper border of pro thorax, 

 and sides of thorax to a considerable extent, with silvery white 

 hair; mandibles simple with a broad, red median band; lower 

 margin of clypeus polished and exposed; face broad; flagellum 

 ferruginous beneath; cheeks broad, with fine, white hair; meso- 

 thorax shining, with coarse punctures; scutellum strongly punc- 

 tured, broadly truncate, subemarginate in middle; tegulse rufo- 

 testaceous; wings dusky hyaline, nervures and the large stigma 

 dark ferruginous; first s.m. not twice as long as second; second 

 s.m. receiving first r.n. near base, the second a short distance be- 

 yond middle; legs rather obscure ferruginous, with white hair, 

 the anterior femora blackened; claws as in B. thomasi; abdomen 

 broadly, densely punctured; first segment red; second black, red 

 apically; third red, more or less stained with black basally; 4 to 

 6 dark; segments 1 to 4 with clear-cut, narrow white hair-bands. 



