238 Mr. E. Saunders' Synopsis of 



metathorax. Thorax clothed with dull greyish brown 

 hairs. Mesothorax strongly punctured. Metathorax 

 largely and clathrately rugose at the base. Wings clear, 

 with a slight cloud along their apical margins, nervures 

 pale. Abdomen somewhat elongate and rather shining, 

 finely punctured, clothed with short greyish hairs ; basal 

 and following segments impressed along their apical 

 margins, the impressions bearing rather denser bands of 

 pale hairs, apical fimbria golden brown. Segments 

 beneath finely and remotely punctured, fringed with long 

 hairs, and ciliated with fine and very short hairs at their 

 apical margin. Legs entirely black, clothed with greyish 

 brown hairs. 



$ . Head clothed with dark sooty or brown hairs, 

 longitudinally strigose, and punctured above the an- 

 tennae. Thorax clothed with brown hairs, strongly 

 punctured. Metathorax as in the $ , the basal area 

 triangular, enclosed by a well-defined raised line. Abdo- 

 men ovate, shining, finely and irregularly punctured, 

 clothed somewhat sparingly with rather long pale hairs ; 

 5th and 6th segments densely with black hairs. Apical 

 portions of all the segments impressed ; glabrous por- 

 tion of the 6th dorsal segment raised in the centre ; 

 beneath finely and closely punctured, segments with 

 long hairs, and with fine short apical ciliations. Legs 

 clothed with black-brown hairs. Scopse pale fulvous- 

 brown. Length 13 — 16 mm. 



Hah. Local but not rare in some places. Norwich 

 and Chobham (spring brood) ; Norwich, Southwold, 

 Bournemouth, Sidmouth, Shirley, and Windsor (autumn 

 brood). 



I have not the slightest doubt that these three so-called 

 species are varieties of one. Bimacidata appears in 

 April, and is taken, like most of the other spring bees, 

 on sallows. Decorata and vitrea appear in August, and 

 are taken on Ruhiis. The only character I know by 

 which the autumn brood (decorata) can be known from 

 the spring brood {himaculata) is the paler pubescence of 

 the face, and the want of the two spots on the 2nd 

 abdominal segment beneath in the <? , but as the ? 

 differs greatly in both broods as to colour, the constancy 

 in this respect of the ^ of one brood does not seem to 

 me sufficient for a specific character. I have sent speci- 

 mens to Professor Perez, of Bordeaux, who tells me that 



