NORTH AMERICAN HYMENOPTERA. 199 



autenn. lO.iointed, inserted on middle of face, rather slender, -J- ^-^;^^ 

 brown fla<a.llum black, or brown-black, with two r.ng joints. The parars.des 

 :ilete. The abdomen is sessile, and in the female very long a^ul ac.mn.ate 

 uroiectin.^ considerably beyond the tips of the wings when they a.e folded oyer 

 « e back "has a metallic lustre. The legs are pale yellowish-brown with the 

 femora dai^ brown. Wings hyaline; veins brown, the marginal twice as long 

 Is Zst^imal, the latter clavate; the postmarginal is .slightly longer than the 

 stomal The male is very much smaller than the female, with a short ovate 

 abdomen and dull rufous antennae, and I can detect but one ring joint _ 



This rare and curious species is described from ten individua s 

 reared from tlie larva of a beetle Acanthoclnit^ obsoletus Oliv., ^vhlch 

 is found boring into pine, and I have reared in all its stages. 



Eiohteen of the chalcid larv.^ issued from a single larva ol the 

 beetle and transformed, without spinning cocoons, into inipa. ; these 

 I placed in a separate box with some loose mold. In three or four 

 davs (I watched them every day) I noticed they began to show signs 

 of "drying up on account of the mold bec(nning dry, so from that 

 day for three weeks I sprinkled, twice a day, a few drops of water 

 over them and kept them in as moist and healthy a condition as 



^°of tiie eighteenth day my labor was rewarded with my first fly, 

 and for some days afterwards with others and I succeeded in rearing 

 ten perfect specimens from eighteen pupa?. 



Subfamily SpALANGiNiF:. 

 SPAL.A5fGIA Latreille. 

 rr, Spala«giadr«so,>liiI*n.sp.-9. Length .08 inch. Blue-black, 

 shinin. The oblong, flattened head is covered with coai^e, .?<sf««i puncture.. 

 ^'iTloS^^i-l median groove ^"^ a triangular pi^ectiou^tt^^^r^ 

 nubescent The 10-jointed antenna issue from the extreme tip of the htad , tne 

 Tiltlorax is elouga ed ; the scutellum has a transverse row of punctures poste- 

 vioit near he tip ■ on the metathorax are two lateral longitudinal grooves and 

 Tilsdisk a doulle row of coarse punctures confluent behind; the abdominal 

 t e n^^deratelylong; the legs are ^lavate, black, pubescent, wih pa e^ 

 reddish tarsi; the wings are hyaline, with a rather long marginal and a .hort 

 curved stigraal vein. 



Described from one specin.en bred from the larva ot a D.pteron 



^Thfs't^cfeT'ILns to agree very closely with the Froctotrupid 

 genus Sijti arsis Forster. 



