Drscripfion.i and llecord'< of B-es. 170 



on tliat of Steinnianu and Welter (Verli. Ver. Rlieinland, 

 1910, p. 1), would be as follows : — 



Family Pharetronidae, Zittel *. — Heterocoela with spicules united 

 into bundles and fibres. (Tuniug-fork spicules often present.) 



Subfamily 1. Dialytin^, RaufF. — Spicules not cemented. {Lela- 

 pia, Kebira.) 



Subfamily 2. PnARETRONiDiE, Steinmann. — Spieule-bundles ce- 

 mented into solid anastomosing fibres. 



Subfamih'o. LiTiiONiNiE, Diiderlein. — Anastomosiag fibresformed 

 of 4-rayed spicules cemanted together. 



Subfamily 4. Murrayonhst.e, K. — Fibi'es of main skeleton 

 formed of calcareous substance (? cement), without an axial 

 core of spicules. 



XIX. — Descriptions and Records of Bees. — XXXVIl.f 

 \'>y T. D. A. COCKERELL, University of Colorado. 



Dianthidium sinapinum, sp. n. 



? . — Lengtli about 8 mm. 



Compact, light mustard-yellow, with black and pale dull 

 ferruginous markings ; head, thorax, and abdomen densely 

 and strongly punctured ; head large ; eyes pale olivaceous ; 

 mandibles with the cutting-edge broad, dark brown', having 

 only the apical tooih and a rather poorly developed second 

 one ; clypeus quadrate, its lower raargiii denticulate ; scape 

 yellow ; fiagellum ferruginous, the apical two-thirds dusky, 

 the end of the last segment blackish ; ocellar region black, 

 sending a broad bla. k stripe downward to each antennal 

 socket, or these black markings may be evanescent and 

 largely replaced by pale reddish ; upper part of clypeus and 

 sides of face sometimes stained witli reddish ; mesothorax 

 with a broad median black band, expanding pos-teriorlv, and 

 two broad sublateral ones^ ending in front at level of front 

 of tegulse, or these bands may be narrower and broadly 

 edged with ferruginous ; hair of face, sides of thorax, and 

 ventral scopa pure shining white ; anterior margin of meso- 

 thorax with appressed white hair^ the rest with scanty 



* A -writer in ' Nature' (Jan. 12, 1911, p. 345) objects to the use of 

 the term Pharetronid:Te on the ground that there is no genus Fharetron. 



t An error occurs in part xxxv. (' Ainals,' 1911, vii. p. 311) : Sigiriis 

 in Ceylon, not in N.W. lucii. 



12* 



