1899 ENTOMOLOGICAL NEWS. 113 



uiimber 150 specimens. The southernmost locality from 

 whence I have received specimens is Blanco county, Texas. 

 The heretofore almost unknown Erebki rossii is common on 

 the Kuskoquim River, Alaska. The specimens of Papilio 

 troihis from southern Florida show interesting differences 

 when compared with the specimens found in the North. 



Since the description of Pamphila oslari was written I have 

 received the following interesting account from its discoverer, 

 Mr. E. J. Oslar, of Denver, Colorado : " P. oslari I take in the 

 foot hills, altitude about 8,000 feet in Jeflferson county at 

 Chimney Gulch and Clear Creek Canon. I find it sitting on 

 the rocks all the time until disturbed, and then it is gone in 

 an instant, and no eye can trace its flight ; but if you exer- 

 cise a little patience, stand still and wait, it will come to 

 the identical spot again. The color of the insect assimilates 

 to a nicety the rocks on which it sits, with its wings closed, 

 and it takes a practiced eye to detect one while at rest. Niso- 

 niades martialis I take at the same time and place and have 

 never seen it anywhere else ; it is therefore yery local and 

 most diflftcult to capture. I find them right on the tops 

 of the mountains that rise perpendicular from the canon, 

 and they are to be seen in little colonies of eight or ten, 

 and are continually on the wing gyrating round and round 

 some favorite rock. They attack everything that flies within 

 their i-adius of flight. I never saw them feeding or taking 

 any rest, except for a minute or two, when something would 

 come along, a Papilio or Colias, when at them they would 

 go until the larger species would be chased out of sight. 

 After a time they would come back and resume the same cir- 

 cular flight, one behind the other. In order to capture any, 

 one is obliged to stand perfectly still for five or ten minutes in 

 the path of their flight, until they get used to your presence, 

 and then they get nearer and nearer to your net which you 

 must hold in position to strike as quickly as possible. It is a 

 case of hit or miss ; if the latter you will not see them again 

 for quite awhile. I have waited for a half-hour before they 

 would put in an appearance again at the old spot and then 

 they took good care to keep out of range of my net. It is 

 single brooded I believe ; I have never seen or taken it after 

 July." 



