G. CCELIOXYS. 145 



point ; the species is also uniformly considerably smaller and the 

 abdomen much less convex. 



4. Ccelioxys rufescens. 



C. atra, ochraceo villosa ; scutello utrinque dente incurvo armato, 

 margiue postico obtuso angulato ; abdomine convexo. 



Coelioxvs rufescens, St.-Farg. Encycl. Meth. x. 109 ; Hym. ii. 

 519 rf$. 



Smith, Zool. iii. 1152 ; Bees Great Brit. 149. 



Gerst. Stett. ent. Zeits. (18G9) 169. 



Nyland. Notis. ur Scillsk. pro Faun, et Flo. Fenn. ii. 279. 



Schenck, Nass. Bien. 366. 



Thorns. Hym. Scand. ii. 276. 

 Coelioxvs apiculata, Nyland. lib. cit. i. 282, pi. iii. fig. 116. 

 Ccelioxys hebescens, Nyland. lib. cit. i. 251, pi. iii. fig. a, vai\, and 



vol. ii. 279. 

 Ccelioxys diglypha, Foerst. Verhandl. Preiiss. Rheinl. x. 295 J . 

 Ccelioxys trinacria, Foerst. lib. cit. x. 300 2 * 



Female. Length 5|-6| lines. — Black ; the head and thorax coarsely 

 punctured ; the face densely covered with short yellow pubescence ; 

 that on the thorax is of a paler colour ; the posterior margin of 

 the scutellum subangular, and armed on each side with a curved 

 spine or tooth ; the wings fusco- hyaline, and having their apical 

 margins clouded. Abdomen shining, conical, convex above and 

 beneath, strongly punctured ; a large angular patch on each side 

 of the basal segment, the second and three following segments with 

 an entire fascia, attenuated in the middle and continued beneath, 

 of ochreous pubescence ; the superior plate of the apical segment 

 lanceolate, the lower plate angular at the apex, not longer than the 

 upper plate. (See PL IX. figs. 2 b, 2 e, 2 d.) ' B.M. 



Var. )3. The apex of the inferior plate angulated and notched at the 

 side, forming an acute appendage at the apex. 



Yar. y. The inferior plate obtuse and rounded at the apex. 



Male. Length 4|-5 lines. — This sex agrees with the female in the 

 pubescence and sculpture of the head and thorax ; the face has 

 the pubescence perhaps a little longer, more dense, and of a brighter 

 5'ellow. The abdomen is similarly convex and similarly banded ; 

 the apical segment is produced into two bifurcate processes, the 

 upper tooth slightly erected and obtuse, the lower tooth longer 

 and acute ; on each side of the base of the segment is a straight 

 acute spine. B.M. 



This is a common species, but it was found in numbers, in com- 

 pany with Osmia xanthomelana, in the Isle of Wight ; it has been 

 taken both in North and South Devon, in Kent, Surrey and Hants, 

 in Yorkshire and at Loch Rannoch, Scotland. 



