little-known Innects fro Xew Mexico. 335 



greatly tVoni T/itmr in its dense chalk-like secretion, wliereiti 

 it closely resembles /'. lja/ii<f, Elirli(Mii. It diircrs tVoni hdhicc 

 in its iniieli lon^jfer and more sleiuler antenniu and the mucli 

 sjjortor tarsal bristles. Tho antennai closely resemble those 

 of yucae, but ditier in the uniformly longer second joint and 

 liie shorter sixth, seventh, and ei^^hth. Prof. J. 1). Tinsley 

 has kindly lent me his series of measurements of P. ifuccic for 

 comj)arison. He has examined that species from California 

 and Mexico, as well as the var. /Jarberi hoin the West Indies. 



Tenthredinidae. 

 Euura Coo per (.e, sp. n. 



9 . — Length .') millim. Clypeus with a broad rounded 

 emargination ; ridges of ocellar area distinct ; frontal crest 

 low but distinct, the lateral portions somewhat more prominent 

 than the middle ; antenna3 about as long as head and thorax, 

 third and fourth joints equal, fifth a little shorter ; outer veins 

 of discal cells in hind wings not interstitial ; stigma large, not 

 greatly tapering to the jioint ; sheath of ovipositor rounded at 

 apex. Black and reddish testaceous or iioney-colour ; an- 

 tennas black at base, the apical three or four joints brown ; 

 Iront, middle of vertex, and occiput black or nearly so ; face 

 below antenna^, orbits very narrowly in front, very broadly 

 behind, honey-colour ; thorax black, lateral lobes of prothorax 

 and sometimes the anterior half of the pleura honey-colour ; 

 wings dull hyaline, hairy, ncrvures and posterior half of 

 stigma dark brown, basal half of stigma whitish ; abdomen 

 lioney-colour, with the basal half dorsally black, the black 

 extending further backwards in the middle than at the sides ; 

 sheath black ; cerci black at ends ; legs honey-colour, tho 

 hind tarsi infuscated. 



Described from four specimens. 



Gall an oval abrupt lateral swelling on the twigs of Sdli.v 

 sp. (a species with very narrow leaves), about 10 millim. 

 long and 7 broad, pale and roughened. 



llah. Vicinity of Las Vegas, N. M., flics emerging April 5 

 and y (-l/«>"y Coupe r). 



The gall is similar to that of Euura salicis-oiuanj Walsh, 

 and it had been assumed that it was the product of that 

 insect. Now that Miss Cooper has bred the flies, however, 

 they are manifestly different. E. me.cicana^ Cameron, from 

 Northern tSonora, is similar in colour to E. salicis-ovuuij and 

 also evidently different from E. Cooj/erw. 



