ENTOMOLOGY. 



729 



Order XIV. IIYMENOPTERA. 

 Order Hymenoptera. Linn. Latr. Lam. Cuvicr. 

 Class Piezata. Fabricius. 



Characters of the Order. 

 Wings nervured, (the avcolae large and unecjual in 

 size,) the inferior ones smaller than the upper. Anus 

 of the females with a sting or an oviduct. 



Section I. Terebrantia. 



Oviduct lamelliform or filiform, in a few resembling 

 a sting and valved; the vagina bivalve, received in a ca- 

 nal beneath before the anus, the valves compressed, in 

 some compressed lamelliform; in others elongatc-cylin- 

 dric, setaceous. 



Division I. 



Abdomen united to the thorax along its whole breadth, 

 without any distinct peduncle. 



Tribe I. Tenthredinides. 



Abdomen sessile. Oviduct composed of two lamellae 

 which are serrated. Mandibles more or less long, termi- 

 nated by two strong teeth. Wings with the marginal 

 cells complete. 



Family I. Tenthridinida. 



Labi*um distinct. Larva: with membranaceous feet. 

 Genus DX. Cimbex. Oliv. Fabr. Spinoli, Latr. 

 Tenthredo. Linnaeus, Jurine, Panzer, De Geer. 

 Crabro. Geoffroy. 

 Clavellaria. De Lamarck. 



Antennae terminated by a distinct club, nearly ovoid. 

 Obs. This genus is artificial; it contains several natu- 

 ral genera, which may be defined from the joints com- 

 posing their antennae. 



* Antennae with five joints before the club, which is 



nearly solid. 

 Sfi. 1. Femorata. Fabricius. 

 Sfi. 2. Axillaris. Panzer. 

 ** Antennae with five joints before the club, which is 



distinctly articulated. 

 Sfi. 3. Leucorum. Fabricius. 

 *** Antennae with four joints before the club, which 



is indistinctly articulated. 

 Sfi. 4. Amcrintz. Fabricius, Panzer. 

 Sfi. 5. Marginata. Fabricius, Panzer. 

 Sfi. 6. Lxta. Panzer. 

 6'/;. 7. Obscura. Panzer. 

 **** Antennx with four joints before the club, Which 



is two-jointed. 

 Sfi. 8. Faciata. Fabricius, Panzer. 

 ***** Antennae with four joints before the club, which 



is composed of three joints. 

 Sfi. 9. Sericea. Fabricius, Panzer. 

 Tenthredo sericea and nitens of Linnaeus are but sexual 

 distinctions of the same species. 



Genus DXI. Hylotoma. Latr. Fabr. Spinoli. 

 Tenthredo. Linne, Geoffroy, De Geer, Panzer, La- 

 marck, Olivier. 

 Cryptus. Jurine. 

 Arge. Schrank. 



Antennae gradually thickening towards their extremi- 

 ties, composed of three joints. Superior wings with 



four submarginal cells, and one marginal cell emitting a 

 little branch. 



Sfi. 1. Rosa. 



Tenthredo rasa. Linn. 



Hylotoma rose. Fabricius, Latreillc. 



Inhabits Europe. 



Obs. Hylotoma furcata of Latreille, Tenthredo furca- 

 ta of Panzer, and its congeners, are distinguished from 

 the genuine Hylotoma, by having filiform bifurcate an- 

 tennae, and should constitute a peculiar genus. 



Genus DXII. Tenthredo.* Linne, Geoffroy, De 

 Geer, Latreillc. 



Allantus. Jurine. 



Antennae simple, composed of nine joints. Superior 

 wings with two marginal and with four submarginal 

 cells. 



S/i. 1. Scrofihutaries. 



Tenthredo scrofihularia. Linn. Fabr. Panzer. 



Allantus scrofihularics. Jurine. 



Inhabits Scrofihularia nodosa and aquatica when in 

 flower. 



Sfi. 2. Militaris. ■ 



Tenthredo militaris. Fabricius, Panzer. 



Inhabits grassy places and the margins of woods. 



Genus DXIII. Dolerus. Jurine, Latreille. 



Tenthredo. Fabricius, Linnxus. 



Antennae simple, nine-jointed. Superior wings with 

 two marginal and three submarginal cells. 



Sfi. 1. Gonagra. 



Dolerus gonager. Jurine, Latreille. 



Tenthredo gonagra. Fabricius, Panzer. 



Inhabits Europe. 



Genus DXIV. Nematus. Jurine, Latreille. 



Antennae simple, nine-jointed. Superior wings with 

 one marginal and four submarginal cells. 



Sfi, 1. Sefitentrionalis. 



Tenthredo sefitentrionalis. Fabr. Panzer. 



Nematus sefitentrionalis. Jurine, Latr. 



Inhabits the European woods. 



Genus DXV. Pristiphora. Latr. 



Pteronis. Jurine. 



Antennae simple, nine-jointed. Superior wings with 

 one marginal and three submarginal cells. Mandibles 

 bidentate. 



Sfi. 1. Testacea. 



Pteronus testaceus. Jurine. 



Pristifihora testacea. Latr. 



Genus DXVI. Cladius. Latr. Illiger. 



Tenthredo. Panzer. 



Antennae nine-jointed, branched in the male, simple 

 in the female. Superior wings with one marginal and 

 four submarginal areolae or cells. Mandibles bidentate. 



Sfi. 1. Difformis. 



Tenthredo difformis. Panzer. 



Cladius difformis. Latr. 



Inhabits Europe. 



Genus DXVII. Lophykus. Latr. 



Pteuonus. Jurine. 



Hylotoma. Fabr. 



Tenthredo. Linn. De Geer, Oliv. Lam. Panzer. 



Antennae pennated in the males, serrated in the fe- 

 males. Superior wings with one marginal and three 

 submarginal cells. Mandibles tridentate. 



Sfi. 1. Pint. 

 Tenthredo fiini. Linn. 



* Some species which are placed in this genus by Latreille, have ten or fourteen joints in their antennae; these should constitute 

 distinct genera. 

 Vol. VIII. Part II. 4 Z 



