2G8 Mr. T. D. A. Cockerell — Descriptions and 



Domlus itrrestris (L ). 



Funchal, Madeira, below tlie Mount Chiuoli, Djc. 28,1920 

 ( TT\ P. Cockerell); Fu'iclial, ]\Iadeiia, at flowers of Streplo- 

 soleji jamesonii, Miers, Feb. 21, 1921 (Cockerel/). 



These are of the European, not the Ganarian, form of 

 J3. terresiris, and as the species was not found in Madeira by 

 Wollaston, I suppose it to have been introduced in recent 

 years. B. ruderatus (Fab.) lias long been known from 

 Madeira, and is very possibly a genuine native. 



Perdita maiira, Cockerell. 



White Rocks, near Boulder, Colorado, at flowers of 

 Physalis, June 13 ( TF. P. Cockerell). New to Colorado. 



Both sexes were taken, and in either sex the third abdo- 

 minal segment may have or lack a pair of small yellow spots. 

 The spot'ess form is the one described as iiiaura, and tiie 

 spotted one is to be called form bi.signata {Perdita hisignata, 

 Ckll., Amer. Mus. Novitates, no. 33, the type a male, not 

 female as there given). I find tli.it one of the original 

 specimens, a female from Cedar Bluffs, Nebraska, has the 

 spots. One of the males fiom Wiiite Rocks is peculiar, 

 having the lateral face-marks L-shaped. The face-marks of 

 male hisignata differ appreciably from those of typical maura^ 

 but, in view of the variation shown by the Colorado specimens, 

 I do not believe the differences to be even subspecific. Also 

 on Phi/salis, at Wliiie Rocks, Mrs. Cockerell took a female 

 Ilalictus perpunctatus, Ellis. 



Ceratina sulcata, Friese. 



S. Africa. 



Meade- Waldo (1913) referred this to C. suhquadrata, Sm., 

 but sulcata is much more heavily punctured on the abdomen 

 and is quite distinct. 



Dialictus suhcyaneus (Ash mead). 



St. Vincent. 



I saw the type {^) of Dufonrea suhcyanea, Ashni., in the 

 British Museum. It is a blue Halictine with two submai- 

 ginal cells; mesothorax strongly punctured. 



