British Hymen.optera. 185 



the basal half of the 1st segment, and in the white 

 colour of the apical bands. Length 9 — 10 mm. 



Hah. Southwold, Hastings, Hampshire, Little- 

 hampton, Hayling Island, Norwich, &c. I expect that 

 this is a common species, but overlooked. 



4. Colletes marginnta, Smith. 



Smith, Zool. iv. 1277 ; Cat. Brit. Hym., 2nd ed., p. 4 

 = balteata, Nyl., Thorns., &c. 



Smaller than any of the preceding, but similar in 

 general appearance. 



The c? may be known from all its allies by the 

 simple 6th ventral segment, which is not foveated at 

 the sides, and has a slightly raised dorsal line ; the 

 other segments have the apical bands entire, and 

 the surface punctured and convex. The genitalia 

 are quite different from those of any other species, the 

 sagittae being produced at each side into a curved wing- 

 like appendage, above which, near the base, projects a 

 strong angular tooth. See pi. vii., fig. 13. 



The ? is very like the others of the genus, but, besides 

 being smaller, it has the hairs of the thorax of a duller 

 brown colour, the surface of the abdomen slightly shin- 

 ing, and the clypeus and faceless hairy ; the 1st segment 

 of the abdomen is largely and rugosely punctured, and 

 clothed with scattered pale hairs at the base ; the 2nd 

 segment has a wide basal band of pubescence; this 

 is often the case also mfodiens, and at the sides in pici- 

 stigma, but in them the band is made up of short, very 

 thick, somewhat scale-like, hairs, whereas in this species 

 the hairs are of the ordinary type (with short lateral 

 branches). Length 8 — 9 mm. 



Hah. Littlehampton, Isle of Wight, &c. I have 

 several males of this species, but have only seen one 

 British example of the female. 



5. Colletes Dariesana, Smith. 



Smith, Zool. iv. 1278 ; Cat. Brit. Hym., 2nd ed., p. 5. 



Shining, black. Head and thorax somewhat remotely 

 punctured, covered with dull brownish hairs, paler on 

 the face and under the wings ; metathorax rugose. 

 Abdomen shining ; 1st segment very finely and remotely 



TRANS. ENT. SOC. 1882. — PART II. (jULY.) 2 H 



