THE CANADIAN ENTOMOLOGIST. 371 



^'Mas.: corpore saepissime minore, antennis longioribus et tenuioribus, 

 flagelli articulis pube albida adpressa vestitis. 



'' Ari/i. albiscapo ( rhom?.) affinis, sed antennis tenuioribus, alis 

 immaculalis prsecipueque punctura thoracis insignia bene distinctus. 



" Lefver som parasit pa Afiobium paniceum. 



" Ett kasseradt af Anobii-larver genomborradt parti af Radix 

 I?-idis florentincC tillvaratogs sistlidne April for undersokning af larvernes 

 utveckling. Den 13 i samma manad framkrop ur ett af boorhalen en 

 liten Pteromalinhona af underslagtet Arthrolytus (Thorns.), hvilken i 

 flera hiinseenden var olik forut kcinda arter. Den 23 x^pril visade sig den 

 forsta bile hanen och under aterstoden af manaden k]acktes sparsamt 

 sma hanar och honor. Under Maj-Juli framkommo begge konen talrikare 

 och i mera utbildade former. I Augusti utklacktes de storsta honorna • 

 derefter aftog frequensen allt mera till den 10 September, da de sista 

 parasitsteklarne observerades" (p. 180). (Notes on the dates of issuance 

 of the parasite.) 



5. Afthro/yttis apatelce Ashmead. 

 Ashmead, 1893, P- ^^2- 

 Webster, 1893, p. 158. 

 De Dalla Torre, 1S98, p. 155. 

 Schmiedeknecht, 1909, p. 359. 



'' Genus Arthrolytus* Thompson. 



"(6) A. apaieloe, sp. n. — $. Length, 1.5 mm. Black, shining, 

 aUhough exhibiting a fine scaly punctation ; scape and legs honey-yellow, 

 or pale ferruginous ; all femora, and the posterior tibit^e broadly at the 

 middle, brown ; flagellum subclavate, brown. The head is broad, much 

 wider than the thorax, the vertex being broad and rounded. The antennae 

 are inserted a little below the middle of the face, the funicular joints being 

 short, not or scarcely longer than wide, the club somewhat large, 

 fusiform. Thorax short, the mesonotum being about twice as wide as 

 long, with the parapsides indicated only anteriorly ; collar distinct but 

 narrowed medially ; scutellum convex ; metathorax short. Wings 

 hyaline, the marginal vein twice as long as the stigmal, the postmarginal 

 not longer than the stigmal. x'\bdomen coriic-ovate, a little longer than 

 the head and thorax united. 



" Hab.— Wooster, Ohio. 



" Bred by Prof. Webster, from the larva of Apatela populi Riley." 



(Ashmead, 1893, p. 162.) 



