XXXI, '20] ENTOMOLOGICAL NEWS 283 



species. Of nearly equal value, however, was the careful 

 examination of different local environmental conditions, such 

 as wet forest, dry forest, grassy open, dry scrub and even 

 the varied vegetation about habitations. 



In this way a fair representation could be secured, but it 

 was the intensive examination of immediate environmental 

 conditions which added the majority of the forms of highest 

 value. 



Thus in the heavy forect at Aracataca the following in- 

 vestigations proved of the utmost importance. 



1. Beating the low foliage. 



2. Beating the masses of vines occurring in small openings. 



3. Beating the rank grasses and plants growing in wet 

 open spots. 



4. Close examination of tree trunks and peeling into beat- 

 ing net all loose patches of bark. 



5. Shaking vigorously in the net the dead dry leaves of 

 trees, found hung in the undergrowth, particularly those of 

 the guarumo, and similar treatment of the dead leaves hang- 

 ing on the platanillo. 



Dead leaves on the ground were similarly treated but 

 usually with much less success. 



6. Close scrutiny and careful raking of the humus and 

 leaf mould, particularly in the deepest recesses of the forest, 

 in the twilight beneath the dense undergrowth. 



7. Peeling into the net the wet rotting stems of dead pla- 

 tanillo. 



An additional factor of importance was found to be the use 

 of a bright light at night. To our light were attracted twenty- 

 five species not found during our field work. A hand flash 

 lamp was also of great value, many fine specimens being se- 

 cured by its aid at night, located by their stridulation or 

 revealed resting on the trail, on logs, tree trunks or more 

 often on the upper side of leaves in the forest undergrowth. 



