Insects. 1279 



minal fasciae less white, and there is a thin pale pubescence between 

 them. The male of Daviesana may be known by examining the 

 abdomen beneath, where the marginal fasciae curve upwards as de- 

 scribed. The male of marginata is so much smaller than the rest, 

 that size would point it out ; it approaches most to that of Daviesana, 

 but the fasciae are continued along the margin of the segment on the 

 under side of the abdomen. 



Genus. — Macropis, Klug. 

 Andrena, Latreille. Scrapter, St. Fargeau. Megilla, Fabricius ? 



Generic characters. — Maxillae slightly bent, the terminal lobe 

 oval, lanceolate, slightly pubescent ; maxillary palpi six-jointed, the 

 labium straight ; labial palpi four-jointed ; mandibles obtusely uni- 

 dentate. Antennae filiform in the male, subclavate in the female ; 

 ocelli disposed in a slight curve. Wings with two submarginal cells ; 

 posterior tibiae of the female furnished with a densely pubescent pol- 

 len-brush. 



The single species of which this genus is composed, is described 

 by M. Leon Dufour in the seventh volume of the ' Annales de la 

 Societe Entomologique de France,' as belonging to the genus Megilla 

 of Fabricius, and the present species he considers to be identical with 

 the Megilla labiata of that author (Syst. Piez. p. 333) ; but a reference 

 to the description creates in my mind such doubts, that I hesitate to 

 coincide in opinion with that eminent naturalist. Macropis labiata is 

 figured by Panzer, but I cannot find that Klug has established the 

 genus in his own works. Panzer informs us, that Klug transmitted 

 the insect to him, together with the generic appellation of Macropis. 

 Dufour also transmitted the species to Latreille, thirty years previous 

 to publishing his own paper in the ' Annales,' and in the f Genera 

 Crustaceorum et Insectorum,' {Lat.{, we find the present species de- 

 scribed as the type of a sub-division of that author's genus Andrena, 

 having two sub-marginal cells ; the true Andrenidae having three. 

 This character alone would be sufficient to separate it from Andrena, 

 and I have accordingly adopted the generic appellation of Klug. 

 The genus is closely allied to Dasypoda in having two sub-marginal 

 cells, the ocelli placed in a slight curve, and in having a stout spine 

 on the anterior tibiae. 



Species. — Macropis labiata, Klug, Panzer. 

 Andrena lagopus, Lat. 



Female. — (Length 4 lines). Black, the face thinly clothed with 



