[2O5] HYMENOPTERA 211 



and middle coxae and trochanters, except a black streak above, yellow ; 

 hind legs black or dark fuscous ; rest of legs rufo-testaceous. 



Antenna? 28-jointed, brown black. Wings hyaline, the stigma and 

 veins light brown, the outer edge of the stigma and the costal vein 

 brown black. Abdomen elongate, smooth and shining, except the 

 petiole which is finely, irregularly rugulose and bicarinate basally. 



Type. Cat. No. 5629, U. S. Nat. Museum. From Yakutat, June 

 21. Two specimens. 



DALLATORREA gen. nov. 



This new genus, remarkable in several particulars and especially in 

 its mandibular and metathoracic characters, is named in honor of the 

 learned author of the great work, Catalogus Hymenopterorum, Dr. 

 C. W. von Dalla Torre, professor in the Imperial Leopold-Franzeus 

 University, Innsbruck, Austria, \vho has not only been a prolific and 

 valuable contributor toward a knowledge of European Hymenoptera, 

 but who, in compiling this great catalogue a labor of 30 years has 

 endeared himself to all working hymenopterologists and reared for 

 himself a lasting monument. 



The true position of this singular genus cannot be definitely settled 

 until the female is discovered. From present knowledge it might just 

 as well be placed in the tribe Plectiscini, with which it agrees in some 

 of its cephalic characters, especially with such genera as Catastenus 

 and Symplecis, as well as with the Mesoleptini. 



For the present, however, judging alone from the characters of the 

 male, I consider it to belong to this group, and in my generic table of 

 the Mesoleptini, Classification of the Ichneumon Flies, p. 65, it will 

 fall in next to the genus Gausocentrus Forster. 



The two may be separated by the following characters : 



Metathorax bispined, the mesonotal furrows strongly impressed ante- 

 riorly ; scutellum black; eyes converging anteriorly; mandibles con- 

 ically acute, although bidentate, the teeth very unequal, the inner 

 tooth being very minute, almost invisible and less than half the 

 length of the apical or outer tooth Dallatorrea. 



Metathorax normal, unarmed, the mesonotal furrows not strongly im- 

 pressed : scutellum yellow ; eyes parallel, not converging anteriorly ; 

 mandibles bidentate, the teeth equal Gausocentrus Forster. 



DALLATORREA ARM ATA sp. nov. 



(PI. x, fig. 5.) 



Male. Length 7 mm. Polished black ; mandibles rufo-testaceous ; 

 palpi and tegulze pale yellowish ; front legs brownish-yellow, the 



