284 ENTOMOLOGICAL NEWS [XXXI, '20 



The species taken were found as follows. 



1. forest foliage 46 10. in bromeliads 9 



2. from dead leaves 29 11. domiciliary 7 



3. attracted to light 29 12. low herbage in open 6 



4. grassland 25 13. on tree trunks 4 



5. vine tangles 22 14. bushes in dry areas 4 



6. under bark 20 15. bare banks along trails 3 



7. in leaf mould 18 16. tree foliage in open 3 



8. in debris in open 15 17. within decaying platanillo .... 2 



9. on bare ground 14 18. in aloes I 



It is to be noted that of the forms secured as listed under 

 numbers 2, 6, 7, 8, 10, 13, 15, 17 and 18, the majority, re- 

 presenting approximately one hundred distinct species, 

 would not have been secured had not intensive work of par- 

 ticular character been undertaken. When we add to this 

 total the twenty-five species secured only at light, the vital 

 necessity for doing specialized field work is readily seen. 

 The collector in the tropics otherwise can not hope to secure 

 anything approaching a representative series, except as a 

 resident, whose efforts have extended over many years at 

 all seasons in the same locality. 



From our observations we are convinced that, though it 

 is of course a much longer process to secure a good represent- 

 ation of the species occurring at one locality in the tropics 

 than in temperate regions, intensive collecting will be found 

 to shorten enormously the time required for this. At Ara- 

 cataca, much the richest locality examined, the number of 

 species added each day to those previously secured was as 

 follows: 35 (first half day), 29, 16, 16, 14, 8, 2, 4, 2, 2, 3, 5, 5. 

 We believe that after two weeks, even at this exceedingly 

 rich locality, great difficulty would have been experienced 

 in finding additional species. The majority of those taken 

 during the last week of our stay were secured only through 

 most difficult and laborious intensive search. 



As to seasonal diversity we have not had sufficient experi- 

 ence to say much. The rainy seasons in the tropics must be 

 an important factor. However, in Cuba, Jamaica and 

 Panama, just sufficient work was done to indicate that, as 



