THe HyMENopterA oF MINNESOTA 215 
Hind Wings 
Veins Veins 
Costal Costa or C 
Subcostal R+M 
Median Cu and M, 
Anal Ist Asvat tipelst AY and) 2d A 
Radian or marginal R,; (at its tip) 
Cubital m-cu and R,+,+M, 
Discoidal m and M, 
Transverse median M, 
Transverse cubital Free part of media or M 
Axillary 3d A 
Cells Cells 
Costal C+Sc+Sce, 
Median M 
Submedian Cu+Cu,+M, 
Anal Ist A+ 2d A; 3d A 
Marginal or radial Ry 
Submarginal or cubital R-+R,+R,+R, 
Ist discoidal M,+1st M,4M, 
2d discoidal. 2d M, 
SPHECOIDEA 
Abdominal segments not strongly differentiated as petiole and gaster; tegulae 
present, wings usually well developed, sometimes vestigial or lost; pronotum with its 
hind angles or tubercles always distinctly remote from tegulae; hairs of dorsulum 
simple not branched or plumose; abdomen with more than three segments visible, 
segments beyond third not hidden. 
This superfamily includes the solitary wasps (see also Eumeni- 
dae, superfamily Vespoidea) which for the most part make burrows 
and store their nests with insects which they have paralyzed by 
stinging. For an interesting account of life history and habits of in- 
sects in this group, see the excellent treatise by G. W. and E. G. Peck- 
ham of Milwaukee “On the Instincts and Habits of the Solitary 
Wasps,” Bulletin No. 2, Scientific Series 1, Wisconsin Geological and 
Natural History Survey. Students should also read pp. 18 et seq. in 
L. O. Howard’s “Insect Book,” Doubleday, Page and Co., 1904. The 
student should also consult Fabre’s “The Hunting Wasps,” Dodd, 
Mead & Co., 1915. Fabre’s observations are by no means confined to 
wasps of this superfamily. 
AMPULICIDAE 
Mesosternum produced posteriorly into an elongate process which is cleft or bi- 
furecate apically ; middle tibiae with two apical spurs; prothorax long; femora swol- 
len near middle; abdomen petiolate, no constriction between the first and second 
segments. 
Species in this group are very rare. An European species lives 
on cockroaches. The only genus listed in the Hymenoptera of Con- 
necticut is Rhinopsis, small wasps, not quite ™% inch long, black. 
