10 BEES OF GREAT BRITAIN. 



Male. Length 3 lines. Black ; the face below the insertion of 

 the antennae and the scape in front cream-coloured ; the man- 

 dibles are of the same colour in the middle, having their base 

 black and their apex ferruginous; the scape of the antennae 

 broadly expanded, subquadrate, concave beneath ; the fiagellum, 

 except the basal joint, fulvous beneath ; the collar with an in- 

 terrupted line, and the tubercles and tegulse in front, white ; the 

 latter are ferruginous behind, as well as the extreme base of the 

 wings and their nervures ; the wings pale rufo-hyaline ; the 

 tibiae, tarsi and knees pale yellowish-white ; the anterior and 

 intermediate tibiae have a black stain behind, and the apical half 

 of the posterior pair black ; the apical joints of the tarsi pale 

 ferruginous. The abdomen oblong-ovate, covered with a short 

 pile, particularly on the apical margins of the segments. 



This must be a very local species ; we have not seen more 

 than half a dozen specimens altogether, and only once met 

 with it in that richest of all counties in hymenopterous insects, 

 Hampshire, where a single specimen occurred at Hawley. We 

 have since repeatedly searched the same locality for it in vain ; 

 Mr. S. Stevens took it at Arundel. Its female is not known. 



4. Prosopis comnta. 

 P. atra, fronte maculata, tibiis flavo maculatis, clypeo cornuto. 



Hylacus cornutus, Smith, Trans. Ent. Soc. iv. 32. 6. t. 3. f. 4 ; 



Zool. vi. 2204. 5 ? . 

 Hylaeus plantaris, Smith, Trans. Ent, Soc. iv. 32. 7. t. 3. f. 2 ; 



'Zool. vi. 2205. 6 $ . 



Female. Length 3^ lines. Black ; head rotundate, a stout an- 

 gular tooth on each side of the clypeus, which has its base raised, 

 forming an elevation which passes backwards between the an- 

 tennae ; the flagellum fulvous beneath, except one or two of the 

 basal joints ; a spot on the tegulae and sometimes an interrupted 

 line on the collar, white ; the posterior tibiae have a ring at their 

 base, and the extreme base of the anterior and posterior tibia? 

 yellowish-white, the claw-joints of the tarsi ferruginous ; the 

 wings hyaline, their nervures testaceous; abdomen oblong-ovate, 

 very bright and shining. 



Male. Length 3 lines. Black ; the antennae pale yellow, having 

 a fusco-ferruginous line above; the front above the clypeus 

 is raised, and the antennae inserted on each side of the promi- 

 nence ; a spot on the tegulae in front and sometimes an inter- 

 rupted line on the collar, white ; the wings hyaline, having a 

 slight fulvous stain and their base yellowish ; the anterior 



