* 



2 HYMENOPTEKA. 



MACEOPHYA. 



Macrophya, Dahlbom, Conspectus Tenth. Siri. et Oryss. Scand. p. 4. 



The species of this genus have a wide geographical range. Fifty species are known 

 from the European fauna, principally from the south ; they also occur in Japan, in 

 the Oriental Region as far south as Southern India, while thirty-eight species inhabit 

 North America. 



l. Macrophya trisyllaba. 



Allantus trisyllaba, Norton, Trans. Amer. Ent. Soc. i. p. 273 ; Cat. of the Tenth, and Urve. of 



N. Am. p. 136 l 

 Macrophya trisyllaba, Cresson, Trans. Amer. Ent. Soc. viii. p. 61 2 . 



Hab. Noeth Ameeica, Canada 2 , United States K — Mexico 2 . 



SELANDRIADES. 



This section differs principally from the Tenthredinides in the mandibles being weak, 

 short, and without subapical teeth, and in the spurs being shorter than one third of 

 the length of the metatarsus. The wings have two radial cellules and three or four 

 cubital ; the lanceolate cellule has never a straight nervure, but may have an oblique 

 one; usually it is contracted or petiolate. The posterior wings, with one or two genera, 

 have two median cellules, more often only one or none. 



The species of this group have a much wider range than the Tenthredinides; for they 

 are found in the Australian, Ethiopian, and Neotropical Regions, from which the latter 

 are altogether absent, except .one species in the last-mentioned region. 



SIOBLA. 



Siobla, Cameron, Trans. Ent. Soc. 1877, p. 88. 



This genus connects the Tenthredinides with the Selandriades. Most of the species 

 have the body-form of Tenthredo, but differ otherwise in having the spurs much shorter, 

 the transverse basal nervure received very close to, but not touching, the cubital nervure, 

 and by the lanceolate cellule being much wider, and provided with a comparatively 

 large oblique or semioblique cross nervure. It agrees very closely with Strongylo- 

 gaster, from which it is only to be distinguished by the cross nervure in the lanceolate 

 cellule. The general neuration is identical with that of Eriocampa; but the wings and 

 body are more elongated, the antennae are longer and filiform and have the third and 

 fourth joints subequal, while in Eriocampa they are short and thick, with the third 

 joint much longer than the fourth. The clypeus in Siobla is truncated or but slightly 

 incised at the apex, and the eyes may or may not reach to the base of the mandibles. 

 The mandibles are stout; the apical tooth is large and forms two thirds of the mandibles ; 

 there is a blunt, short, subapical tooth. The palpi are long ; the basal joint of the 



