140 AP1D-2E. 



3. Stelis octomaculata. 



S. atra, punctulatissima, abdominis segmentis maculis lateralibus 

 flavis. 



Stelis octomaculata, Smith, Zool. iii. 1155 <$ <j> • Bees Great Brit. 153. 



Schenck, Nass. Bien. 351. 



Thorns. Hym. Scand. 268. 

 Stelis ornatula, Nyland. Notis. ur Stilish, pro Faun, et Flo. Fenn. ii. 

 106. 



Female. Length 3 lines. — Black; head and thorax closely and 

 strongly punctured, the face has a thin silvery-white pubescence, 

 the hinder margin of the vertex subemarginate. Thorax shining ; 

 the wings fusco-hyaline, their apical margins clouded ; the scutellum 

 slightly produced, subangular, pointed in the middle. The abdo- 

 men shining, closely punctured, but not so strongly as the head and 

 thorax ; the basal segment has on each side an ovate yellow macula, 

 and the three following an elongate-ovate stripe, pointed within ; 

 the apex rotundate. 



Male. Length 3 lines. — Closely resembling the female, but differing 

 in having an ovate macula on the two basal segments of the abdo- 

 men, the third has a narrow streak on each side, the fourth two 

 spots on each side, and the fifth a single spot. 



This species was bred by Dr. Thwaites from the nest of Osmia 

 leucomelana ; subsequently I took two specimens at Hawley, near 

 Blackwater, Hants, where the same species of Osmia is found ; I also 

 took a single specimen at Sidmouth, in August 1872. It is very like 

 S. minuta of St.-Pargeau, from which it differs principally in the 

 form of the scutellum, the posterior margin being subangular and 

 somewhat produced over the metathorax ; in S. minuta it is rounded. 

 Dr. Sichel sent specimens of S. minuta for comparison ; the differences 

 are slight, but appear to be specific. The species is very rare, not 

 more than half a dozen specimens having been taken in this country. 



Genus 6. C(ELI0XYS. 



Apis (pt.), Linn. Syst. Nat. i. 953 (1766). 

 Anthophora (pt.), Fair. Syst. Piez. 372 (1804). 

 Megachile, Latr. Hist. Nat. Ins. 53. sec. 3 (1805). 

 Ccelioxys, Latr. Gen. Crust, et Ins. iv. 166 (1809). 



Head transverse, as wide as the thorax ; ocelli in a triangle on the 

 vertex ; the eyes elongate- ovate, pubescent ; antenna? filiform ; the 

 labial palpi 4-jointed, the two basal joints elongate, the second a 

 little longer than the first, the thd and fourth minute and articu- 

 lated near the apex of the second joint. Maxillary palpi short, 3- 

 jointed, the basal joint shortest, the second thicker and the apical 

 one ovate. The labrum elongate, the sides parallel, its base produced 

 at the lateral angles. Thorax subglobose, the scutellum armed 

 laterally at its base with a curved acute tooth ; the anterior wings 

 with one elongate marginal cell rounded at its apex, two submarginal 



