1924] 
Flower Visits of Insects II 
109 
Among the Nomadidse, some species of Holonomada maybe 
inquilines of Tetralonia and Melissodes. In the Pasitidse, Holco- 
pasites is probably an inquiline of Panurgidse. Of the Melectidse 
Bombomelecta thoracica is evidently an inquiline of Anthophora 
ursina and M electa interrupta of Amegilla walshii. 
In the flight of the inquilines there is a marked correlation 
which often seems to determine the time. Thus Alcidamea 
simplex flies 85 days while its inquiline, Microstelis lateralis, 
flies 43 days. Neotrypetes productus flies 144 days while its 
inquiline, Stelidium trypetinum, flies 135 days. 
But the phenological position is usually quite inveterate 
and hereditary, for the inquilines are usually related to their 
hosts. Ten species of Triepeolus are evidently mainly inquilines 
of Euceridse. They fly from June 27 to October 21 while the 
Euceridse fly from April 8 to October 22. Consequently 
Triepeolus only infests the late Euceridse. So phenologically 
the species resemble their relatives more than they do the 
Euceridse. One infests Melitoma taurea, one of the Emphoridse. 
So it seems the genus is more apt to infest an unrelated host 
flying at the same time than it is to change time to follow the 
Euceridse. Some of the early Euceridse may be infested by 
Holonomada. Colletes flies from March 20 to October 30. Their 
inquilines, Epeolus, fly from May 29 to October 23. So there is 
at least one Colletes not infested by Epeolus, C. ineequalis, possibly 
infested by some Nomada. So that phenologically the Epeolidse 
resemble one another more than they do the groups on which 
they are inquiline. 
As in the case of oligoleges, the conclusion is reached that 
the phenological position is the oldest, most inveterate, and the 
inquiline habit later and determined by, rather than determining, 
the phenological position. 
Other Visitors. 
Lepidoptera. — The presence and time of flight of the Lepid- 
optera is determined by the occurence of their food plants. 
Usually they fly a long time and have more than one brood. 
