HYMENOPTERA. 243 



leaf of the plant the larva feeds on, but most commonly 



on or in the ground. Imago with antenna nine-jointed, 



of uniform substance, or attenuated towards the apex; 



mandibles short, strong, very acute at the apex, and having 



one internal tooth; maxilloi with the blade 



acute, the galea obtuse and exarticulate, 



the feelers long and six -jointed; lahium 



short, with the Ugula distinctly trilobed ; 



wings ample ; podeon equally developed 



with the other segments ; oviduct with 



teeth like a saw. Abundant in the spring 



and summer in woods, &c., on leaves and flowers. Ne- 



matus, Cladius, Croesus, Emphytus, Dolerus, Dosytheus, 



Allantus, Fenusa, Asticla, represented in the margin, Se- 



landria, Athalia. 



Hylotomites. Larva cylindrical, rather attenuated to- 

 wards the extremities, with six articulated and fourteen 

 membranaceous legs. Inhabits and feeds on the leaves of 

 vegetables. Pupa changes mostly on the surface of the 

 ground. Imago with the antennce three-jointed ; the basal 

 and second joints very short, the third very long, ciliated, 

 and often double, or having two shafts in the manner of a 

 fork ; mandibles corneous, acute, with a small internal 

 tooth ; maxillce with the blade acute, the galea robust and 

 obtuse, the feeler long and six-jointed; lahium short, with 

 the Ugula small, but distinctly trilobed ; feelers four -jointed; 

 ocelli three ; body with the segments and oviduct as in the 

 Allantites. Settles and feeds on umbellate flowers. Schi- 

 zocerns, Hylotoma. 



Club-homed saw-flies or Tenthredinites. Larva mostly 

 shagreened, cylindrical, with six articulate and twelve pre- 

 hensile legs. Feeds on the leaves of trees. Pupa changes 

 in a case composed of a glutinous matter, which becomes 

 very hard when exposed to the air ; the case is attached to 



r2 



