6 ENTOMOLOGICAL NEWS [Jan., '14 



speed. None of the larvae returned to the surface after being 

 fed. 



Earlier the following evening the colony was again visited. 

 The bank was searched for adults without success. The first 

 larva appeared at or near its entrance at 6.35 P. M. The sky 

 was one-half cloudy, wind from the south. This larva was one 

 of the solitary ones and numbered 7. Number 6 was up at 

 6.39. Numbers i and 2 were up at 7.00 P. M. All "traps" 

 were set by 7.03. A moment later a shout sent I, 3 and 6 

 down. Number 7 seemed wild and more easily disturbed than 

 the others; perhaps it, being alone, got more to eat and was 

 less greedy. At 7.20 a Pasimachus (coleopter) was given to 

 number i. A struggle ensued. Twice the beetle managed to 

 back to the surface only to be dragged from view again. Num- 

 ber 2 was offered a Chalybion (wasp) which it took. Buzzing 

 was heard within for some moments later. Number 6 took a 

 Mutillid. Number 4 a Pelopoeus wasp head first. Number 3 

 took the head from a Cicindela which was too tightly held in 

 the forceps. Number 5 took a Cicindela as it ran over the hole. 

 Number 8 took a pentatomid. This closed the observations 

 for the two evenings. 



We noted that the larvae of Amblychila cylindriformis were 

 rather general feeders, the Trox alone being rejected. 



The following morning the colony was visited. The body 

 of the Pelo\poeus (legs and wings gone) was found three inches 

 from number 2 and the body of Chalybion two inches from 

 number 2. Number 8 was carefully excavated, a small guide- 

 straw being used. The plan of the burrow is shown in PI. II, 

 Fig. 14. The dimensions are there given. 



The colony was also very carefully excavated. Guide- 

 straws were used and the digging done from one side. (See 

 PI. II, Fig. 13), Each larva was placed in a vial bearing the 

 number of the hole and the contents of each hole were placed 

 in a vial similarly numbered. 



In all but two holes, number 8, to which was fed the Penta- 

 tomid, and number 5, to which was given the Cicindela, we 

 found the remains or parts of the food given the night before. 

 In number i was found the Pasimachus one and a half inches 



