660 Mr. 'T. D. A. Cockerell—Descriptions and 
EXPLANATION OF PLATE X. 
Lepidocoleus graye, sp. n. 
Upper Ordovician, Lower Ardmillan series, Drummuck group, 
Mudstones: Thraive Glen, Girvan, Ayrshire. 
Fig. 1. Side-view of a shell with the upper and lower extremities 
broken away. xX 5 diam. Holotype, B.M., In. 21648. 
Fig. 2. View from “fixed” margin of same. Xx 3 diam. 
Fig. 8. Enlarged view of the two lowermost plates of same, showing’ 
details of ornament. x 10 diam. 
Fig. 4. Diagrammatic transverse section. X 6 diam. 
Fig. 5. Side-view of another shell, showing rounded basal extremity. 
x 3diam. B.M., In. 21649. 
Scalpellum (Arcoscalpellum) fossula, Darwin. 
Upper Senonian, Actinocamax quadratus-zone: Kast Harnham, 
near Salisbury, Wilts. 
Fig. 6, Left side of an almost complete capitulum. The rostrum is seen 
on the inside of the displaced right scutum, and the inner 
surface of the displaced right rostral latus is seen at the base of 
the capitulum. 5 diam, B.M., In. 21559. 
Scalpellum (Arcoscalpellum) angustatum (Geinitz). 
Turonian (Rhynchonella cuviert or Terebratulina-zone) : Southeram, 
Lewes, Sussex. 
Tig. 7. Carina, Outer view. Holotype of S. angustum (Dixon), Geol. 
Sussex, pl. xxviii. fig. 9. xX 4 diam. Brighton Museum. 
Fig. 8. Side-view of same. 
LXXX.—Descriptions and Records of Bees.—XCIV. 
By T. D. A. Cocxrrety, University of Colorado. 
Dianthidium sinapinum flavatum, subsp. 0. 
Anthidium flavatum, Nurse MS. 
2? (type).—Like D. sinapinum, Ckll., from Karachi, but 
ocelli on a black patch, and a black stripe from each lateral 
ocellus to antenna; mesothorax with a median black stripe, 
ending posteriorly im a large black patch which includes 
extreme base of scutellum; halfway between middle and 
sides of mesothorax are broad black bands, not extending 
quite as far anteriorly as level of anterior margins of tegule; 
margins of. scutellum, on each side of the middle, less 
convex. Abdomen with a median black stripe, and extreme 
bases of segments black, giving a dusky effect to the trans- 
lucent hind margins covering them. 
3 .—A large quadrate black patch occupying front, limited 
above by a yellow occipital band, and at sides by narrow 
