402 ATTEMPTED DIVISION OF BRITISH INSECTS. 



by its parent, and stored in cells which are constructed for the 

 purpose, mostly in timber which is going to decay ; these cells 

 are sometimes crowded together without order, but mostly regu- 

 larly following each other in a cylindrical tube, composed of wax, 

 leaves, mortar, and a variety of substances ; this cylindrical tube 

 being constructed in, and closely fitted to, a perforation made in 

 the timber for the purpose, as the perforation passes completely 

 through the substance of the timber, the larvae which are first 

 deposited, and consequently first become pupa? and perfect insects, 

 escape one after another without disturbing those above them. 

 Imago, with antennae thirteen-jointed in the female, fourteen - 

 jointed in the male ; they are slightly elbowed at the second 

 joint, which is much longer than the others ; the blade of the 

 maxillae is elongate and somewhat falcate ; the maxillary feelers 

 are minute, and generally composed of six indistinct joints ; the 

 labium has its ligula variously developed ; it is always trilobed, 

 but the central lobe, though always elongate, varies in the pro- 

 portion it bears to the labial feelers ; the lateral lobes are very 

 minute, short, and acute ; the labial feelers have the basal joint 

 long, the second longer, the third and fourth short, somewhat coni- 

 cal, and forming an angle with the second ; the hind-tibia? are not 

 formed for collecting pollen, but the body of the female is clothed 

 beneath with a thick covering of hair, which serves for this use. 

 Anthidium, Megachile, Osmia, Heriades, Chelostoma, Ceratina ? 



Natural Order. — Panurgites. 



Larva and pupa, as far as the British genera are concerned, un- 

 known. Imago, with antennae thirteen-jointed in the females, 

 fourteen-jointed, and somewhat moniliform, in the males ; max- 

 illae with the blade lanceolate and of moderate length ; the 

 maxillary feelers of equal length, and six-jointed ; labium, with 

 the ligula trilobed, the central lobe about equal to the true lip in 

 length, the lateral lobes very short and acute ; the labial feelers 

 with four joints, varying but slightly in length from each other ; 

 the feelers exceed the ligula in length ; wings large, flight slow ; 

 insect inactive ; economy unknown ; body rather stout ; black, 

 hairy. Inhabits in immense abundance the flowers of Leontodon, 

 Hieracium, and other similar composite plants, in August and 

 September. Panurgus. (Systropha, Xyocopa,) &c. are closely 

 allied ; the latter insect's economy nearly approaches that of Ce- 

 ratina in the preceding order. 



