84 Bulletin of the Brooklyn Entomological Society Vol. XIII 
the males generally occupy the basal segments and the females 
the apical segments. These remarks are based primarily upon a 
study of Polistes annularis. A notable exception was found in 
Andrena crawford, in 92 parasitized individuals, of which every 
parasite was located between the fourth and fifth segments.” 
It is not easy to see how Polistes annularts can form a rule to 
which Andrena crawfordi is an exception any more than the re- 
verse. In fact the Andrena seems to me to resemble the usual 
cases, while the Polistes is rather exceptional. 
Without the qualifying clause, “indifferent”? means that finally 
the parasites will occur an equal number of times under each seg- 
ment. The cases given by Pierce for Polistes annularis are rear- 
ranged in the following table: 
I 2 3 4. 5 6 
Dorsal segments : 
Vales hte caries pierre eee age I 21 132 85 29 2 
Prema legit vice ius nahe pate — — 2 29 106 IO 
Ventral segments : 
ING Ken Lech ares ees 8 ca eee eae Se — 5 I4 I6 I — 
remmale stacker nate ase rete nee — —_— 2 3 9 — 
General : 
IVE ae SH ee onus EE siete onl eae I 26 I46 IOI 30 2 
emalles Misag see face ee — seen) | 4 32 II5 10 
a me —e oO eA Bees, 
MRO tallies atte het hike eilegseee the I 26 I50 133 T45 I2 
The maximum for the males is under the third dorsal and 
fourth ventral. The maximum for the females is under the fifth 
dorsal and ventral. The general maximum for the males is under 
the third, really the third dorsal. The total shows a maximum 
under the third and a secondary elevation under the fifth resulting 
from mixing the females and males. Pierce’s “basal and apical” 
mean third and fifth. More males occur under 5 than under 2 
and more females under 4 than 6. 
The parasites observed by me occur as follows (I did not look 
for ventral cases) : 
In 100 cases 96.0 per cent. of the parasites of bees fall under 
the fourth segment. In the Eumenide 50.0 per cent. fall under 3 
and 43.3 under 4. 
In 55.5 per cent. of the cases in which the parasites fall in an 
unusual position a single host carried more than one of them. 
