58 Psyche [April 



now described is generically distinct from both Tetrapedia and 

 Exomalopsis. 



Diadasia Patton. 



The three bees described below are referred to Diadasia, which 

 is probably distinguishable from Ancyloscelis. I have not been able 

 to examine the type of Ancyloscelis (A. ursinus Hal.), but from what 

 I can learn, I believe it is a Dipedia or Leptergatis. Holmberg's 

 Leptometria and Teleufemnesta have been referred to Ancyloscelis, 

 but they have an apparently valid character in the hind wings, 

 pointed out by Holmberg; the separation of the discoidal and 

 cubital nervures takes place about half way between the trans- 

 verso medial and the transversocubital, instead of very much nearer 

 the transversomedial as in Diadasia, etc. In this character the 

 bees now described agree with Diadasia, and are readily separated 

 from Leptometria and Teleuternnesta. The North American 

 Dasiapis, which in some ways closelj^ resembles Leptometria, 

 has the Diadasia venation of the hind wings. 



Diadasia parahybensis sp. nov. 



Male. Length about 6J mm., the abdomen short and subglobose; black, 

 wholly without light face-markings, the long tarsi, and apical spot on tibiie, fer- 

 ruginous; eyes pale ochreous; facial quadrangle very much longer than broad; hair 

 of head and thorax very pale ochreous, almost white, quite white below; on vertex 

 the short hair is stained with brownish; flagellum ferruginous beneath; mesothorax 

 shining, with rather dense strong punctures; tegulse dark reddish; wings strongly 

 dusky; b. n. meeting t. m.; middle and hind femora incrassate, but not excessively 

 so; hind spur of hind tibia considerately longer than the other; hind basitarsus 

 gently curved; abdomen covered with a short felt-like reddish tomentum, the hind 

 margins of the segments broadly pallid but also hairy. 



Hah. — Independencia, Parahyba, Brazil {Mann & Heath). 

 In Friese's table of Ancyloscelis (Flora og Fauna, 1908, p. 51) 

 this runs to 4, and runs out on account of its size, but really comes 

 nearest to A. riparia Ducke, with which it agrees in the keeled 

 sixth ventral segment of abdomen ; it differs, however, by the dusky 

 wings and the color of the hair of the head. In my table of North 

 American species (Amer. Nat., XXXIX, p. 742) it runs to Dia- 

 dasia dinnnuta (Cr.), from which it differs at once in the character 

 of the abdominal hair, which in diminuta is long and loose. 



