266 GENUS EMPHYTUS. 



Genus EMPHYTUS. 



Emphytus, King, Berl. Mag., viii, 278 ; Htg., Blattw., 245. 



Wings with two radial and three cubital cellules, the first the longest 

 and receiving a recurrent nervure near the middle, the second receiving 

 the recurrent nervure close to the first transverse cubital. Basal ner- 

 vure parallel with the recurrent, interstitial, or received not far from the 

 transverse median, which is oblique, and not received in the middle of 

 the median cellule. Lanceolate cellule, with an oblique cross nervure. 

 Hind wings without transverse cubital and recurrent nervures. 



Antennae short, rarely long and filiform ; the third joint not much 

 longer than fourth if that. Head cubital, large; eyes projecting; 

 clypeus incised ; labrum large, broader than long ; palpi long. Legs 

 long, claws bifid, patellae small ; hinder tarsi longer than tibiae. Man- 

 dibles short, broad, with one subapical tooth. 



The body is long, cylindrical, with the abdomen cylindrical or slightly 

 depressed. Thorax oblong, with the sutures deep, the scutellum rounded 

 or triangular in front and generally punctured behind ; cenchri mode- 

 rately large or small. 



The abdomen is rarely entirely black, more often it is banded with 

 red or white, entirely yellow, or marked with coloured fasciae. The legs 

 are banded with white, or may be three coloured. With some species 

 the antennae are annulated with white. 



The larvae are long and cylindrical, generally 

 greenish on the back, lighter at the sides ; more rarely 

 they are covered with a white powder. They rest 

 with the body curled up into a ball, the tail turned up 

 in the centre, when not feeding. They do not spin a 

 cocoon, so far as is known. Most of the species bore 

 into stems to pass into the pupa state. Rosaceous 

 plants are what they feed principally upon, although a 

 few are attached to oak. 



The genus is characteristic of the Paleearctic and 

 Nearctic Regions. Species are also found in Japan, 

 and one is known from Central America. Thirty-one 

 European species have been described, and six from 

 North America. 



Synopsis of Species. 



1 (2) Transverse median and second recurrent nervure interstitial ; 

 transverse median nervure in hind wings united with acces- 

 sory. Antennae short, slightly compressed at the apex, the 

 fifth to eighth produced beneath at the apices, the third 

 longer than fourth. Clypeus deeply and broadly incised. 



