112 Bulletin. of the Brooklyn Entomological Society Vol. XV 



NEW SPECIES OF TENTHREDINOIDEA (HYMENOPTERA). 



By Alex. D. MacGillivray, Urbana, Ills. 



The following" descriptions of new species of Lydidse and Ten- 

 thredinidae are of species bred by Dr. H. Yuasa during the course 

 of his studies upon the larvae of the Tenthredinoidea. 



Pamphilius unalatus n. sp. — Female. Body black with the 

 following parts white : clypeus, dash along occipital furrows, 

 irregular dorsal band, caudal portion broadest, extending from 

 each compound eye to the caudal margin of the head, occipital 

 orbits broadty, almost connecting with dorsal dash, genal orbits 

 narrowly, lateral portion of collar, tegulse, two adjacent trian- 

 gular spots on median lobe of mesonotum, mesoscutellum, 

 metascutellum, small elongate spot on ventral portion of meso- 

 pleura, coxae except proximal portion, trochanters, and femora ; 

 following parts rufous : mandibles, tibiae, tarsi, and abdomen ; 

 antennae black, consisting of twenty-four segments, second seg- 

 ment about one half the length of third, third slightly longer 

 than fourth, fourth and fifth subequal ; clypeus broad, trun- 

 cate ; occipital furrows deep and continuous with deep furrows 

 extending to antacorise, cuticle cephalad of line drawn through 

 lateral ocelli irregularly roughened, caudad of it smooth and 

 polished ; mesonotum, except mesoscutellum, polished ; meso- 

 scutellum finely roughened ; claws deeply cleft. Length 9 mm. 



Habitat: Ithaca, iSTew York. No. 183-1. 



This species is related to dentatus MacG., but lacks the ocellar 

 basin and V-shaped ridge of this species. 



Tenthredo yuasi n. sp. — Female. Body black with the fol- 

 lowing parts yellowish white: clypeus, labrum, triangular spot 

 on supraclypeal area, genal orbits, ventral half of frontal 

 orbits, collar, and spot above metacoxae ; the following parts 

 dull rufous : antennae, occipital and vertical orbits broadly, 

 tegulae, broad V-shaped mark on median lobe of 'mesonotum, 

 extending onto lateral lobes, mesoscutellum, metascutellum, 

 propleura, mesopleura, spot on metapleura, and mesosternum ; 

 abdomen except saw-guides and legs except dorsal surface of 

 metaf emora, polished rufous ; clypeus broadly roundly emar- 

 ginate ; median fovea wanting ; ocellar basin hardly depressed ; 

 dorsal aspect of metathorax finel}^ punctured ; antenna with 



