382 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



by N. Banks at Great Falls, Maryland, compared), with the very 

 prominent spurious veins betw^ven the real ones. The venation, how- 

 ever, differs in detail. Rj ^^^ ^ long fork, but Rg and R4, more as in 

 Micromus, are forked so briefly as to appear simple, the apical margin 

 of the wing not being preserved. The very complicated Rg (as I 

 understand Needham's nomenclature) has the first branch divided, 

 each division again forked, while the other two branches are each 

 forked. The first fork of the media only is visible. The following 

 measurements are in microns : Fork of Rj across wing to fork of first 

 branch of R5, 800; fork of first branch of Rg to margin of wing, 1600, 

 the upper and lower cells in the secondary forks of its branchlets, 

 respectively, 865 and 320 long; length of cells in forks of second and 

 third branches of R5, each 480 ; length of cell in fii'st fork of media, 560. 

 These cells are measured from fork to middle of margin. 



Oligocene: Gurnet Bay (Brodie). More perfect material may indi- 

 cate a distinct genus. The species is very different from S. relicta 

 Hagen and S. amissa Hagen, found in Baltic amber. The specimen 

 is in the British Museum (I. 8644.) A wing of the ant Oecophylla, 

 atwvina Cockerell is on the same small piece of rock. 



HYMENOPTERA. 



TAENIURITES, new genus (Tenthredinidae). 



Body elongated, parallel-sided, the abdomen bandlike, the middle 

 segments more than twice as broad as long; head rather small; an- 

 tennae long, not very slender; hind femora inserted beneath third 

 abdominal segment, short, not reaching beyond fifth. Anterior 

 wings with costal cell distinct, the transverse vein stout, oblique, a 

 little basad of insertion of basal nervure, as in MacGillivray's figure 

 of MacropTiya; basal nervure inserted far from origin of cubital (as 

 in Hoplocampa) ; basal and first recurrent nervures parallel; marginal 

 cell with cross-vein arched upward or outward (as in MacropTiya), 

 inserted near beginning of last third of third submarginal cell; 

 second submarginal cell very long, receiving first recurrent nervure a 

 short distance before middle; third submarginal greatly broadened 

 apically, with the lower apical corner produced (style of MacropTiya); 

 median vein (cubitus) bent or angled at origin of basal nervure, its 

 basal part straight (style of Stromhoceros) ; basal nervure some distance 

 basad of transverse-median (as in Stromhoceros); second discoidal 

 cell with its side on first discoidal much longer than that on third 

 (as in MacropTiya); lanceolate (anal) cell without any cross-nervure, 

 narrowed subbasally by the upward bending of its lower nervure, the 

 bend gradual, not at all abrupt. Hind wings with the lower apical 

 corner of the median cell just before the end of the broad anal (as in 

 Strongylogaster), but the upper apical corner more produced (as in 



