24 
éonsider that they may possibly be the same. The male sometimes has 
the tubercle absent from basal dorsal abdominal segment. 
‘TIPHIA ILLINOENSIS Robertson 
I have seen only the male of this species, which is distributed widely 
throughout Illinois. Robertson made no mention of the median trans- 
verse incision of first abdominal segment in his description, but the type 
specimen possesses this character, as also do several other specimens in 
the type series. Mixed with the type series were several specimens of 
punctata, the type of the latter being so much larger that they were not 
associated with it. 
PLATE I ‘ 
Fig. 1. Paratiphia algonquina, hypopygium of male, dorsal view, with eighth 
ventral segment removed. 
Fig. 2. The same, ventral view. 3 q 
Fig. 3. The same, lateral view. 
Fig. 4. Neotiphia acuta, hypopygium of male, ventral view, with eighth ven- 
tral segment removed. 
Fig. 5. Tiphia punectata, hypopygium of male, ventral view, eighth ventral 
segment in position. 
Fig. 6. The same as Fig. 4, lateral view. 
Fig. 7. The same as Fig. 5, lateral view. 
Fig. Tiphia transversa, hypopygium of male, ventral view, with eighth 
ventral segment removed. 
Fig. 9. Tiphia punctata, apex of tibia and basal joint of tarsus of hind leg, 
caudal view. 
Fig. 10. Tiphia inornata, elypeus of male. 
Fig. 11. Tiphia clypeata, same. 
Fig. 12. Tiphia inaequalis, marginal and submarginal cells of wing. 
Fig. 13. Tiphia inornata, same. 
~ 
October 1, 1918. 
