HYMENOPTERA. 595 



small and distant ; the fore-wings have only two complete cubital cells, the second of which receives the first 

 recurrent nerve. 



Aporus, Spinola, has also two complete cubital cells, but the second receives the two recurrent nerves ; in other 

 respects they entirely resemble Pompilus. 



The others have the first seg^nent of the thorax narrowed in front like a knot, and the first abdominal segment, 

 and sometimes part of the second, narrowed into an elongated peduncle ; the upper wings have always three perfect 

 cubital cells, and the commencement of a fourth. 



Ammophila, Kirby, has the mandibles dentate, and the 

 maxillae and labium very long and proboscis-like ; the second 

 cubital cell receives the two recurrent nerves. T>T)e, Sphex 

 sabulosa, Linn, [a very common British species], the female 

 of which provisions her nest with caterpillars. 



Miscus, Jur. (Fam. 1), differs only in having the third cu- 

 bital cell petiolated in front. 



Others have the mandibles and palpi similarly formed, but 

 the maxillae and labrum are much shorter. 

 In Pron<eus, Latr., the second cubital cell receives, as in 

 Fig. 121.— Ammophila sabulosa. Ammophila, the two recurrent nervures. [A large African 



species]. 

 In Sphex proper the same cell receives only the first recurrent nerve ; the third is inserted beneath the other. 

 IS.flavipennis, the only British species, but very rare.] 



In Chlorion, Latr., the first recurrent nerve is inserted beneath the first cubital, and the second beneath the 

 third. C. compressum, a splendid green species with red thighs, which is very common in the Isle of France, 

 where it provisions its nest with Blattae. 

 Dolichurus, Latr., has the maxillary palpi much longer than the labial, and nearly thread-like. 

 The last Fossores of this third division have no teeth to the mandibles. 

 Ampulex, Jur., resembles Chlorion in the insertion of the recurrent nerves. 

 In the two following the second cubital cell receives the two nerves. 

 Podium, Latr., has the maxillary palpi scarcely longer than the labial. [Exotic species.] 



Pelopteus, Latr., has them longer, with unequal joints ; the antennae are inserted higher. P. spirifex, a conti- 

 nental species, makes its nests of mud in the angles of rooms, arranging them spirally, covering them with mud, 

 and provisioning them with Spiders, dipterous insects, &c. 



4. The Bemlecides have the collar linearly transverse, the sides not extending to the base of the 

 wings ; the legs short, or of moderate length ; the abdomen semiconical and elongate ; the labrum 

 naked and exserted. This family is named after the genus 



Bembex, Fabricius, — 

 The species of which are peculiar to warm climates. The body is elongated, pointed behind, mostly 

 varied with black and yellow, or reddish and glabrous ; the mandibles narrow, elongated, toothed 

 inside, and crossing each other; the fore-tarsi of the females furnished with spinose ciliae ; the males 

 have generally one or two elevated teeth on the under-side of the abdomen. The species are rapid in 

 their flight, and make a sharp buzzing noise ; many emit a strong scent of roses. 



Some have the proboscis long, and the labrum forms a long triangle. 



Bembex proper has very short palpi. B. rostrata, Linn, [a reputed British species], forms deep burrows in the 

 sand [for its nest], which it provisions with two- winged flies, as Syrphidae, Muscidae, &c. 



Monedula, Latr., has the palpi long. [Exotic species.] 



Stizus, Jur., has the proboscis not elongated, and the labrum short and rounded. [Exotic species.] 



5. The Larrates have the appearance of the Bembecides, but the labrum is concealed, and the man- 

 dibles have a deep notch within at the base. 



Some have three complete cubital cells. 



Palarus, Latr. {Gonitis, Jur.), has short antennae thickened at the tips, and the second cubital cell is petio'ated. 

 [A continental species]. 

 Lyrops, 111., has filiform antennae, and the mandibles have a tooth within. 

 Larra, Fab., differs from Lyrops in the mandibles not having a tooth within. 

 The others have only two complete cubital cells. 



Dinetus, Jur., has both cubital cells sessile, and the mandibles 3-dentate within. 

 Miscophus, Jut., has the second cubital cell petiolated, and the inside of the mandibles not toothed. 



G. The Ni/sso7iiens have the labrum more or less completely hidden, the maxillae and labium not 

 forming a proboscis; the mandibles without a notch at the base within ; the head of ordinary size, and 

 the abdomen gradually attenuated and never peduncled. 



Q Q 2 



