«4. 































of wire screen and cheesecloth set on saucers of damp sand, From a 
inary wire screen a strip 7 inches wide and 12 inches long is cut. The 
re bent together and fastened by by séwing with strands of wire. One or 
cross wires are then pulled off one end of the cylinder, and on the 
ends of wire a piece of cheesecloth is pressed to form the top, the wires 
shrough the cloth and holding it in place. The finished cylinder is _ 
is in diameter and seven inches high. It is very cheap and easily made, 
ds a maximum of ventilation. _{T. E. Holloway. ] 
PLANT MATERIAL DESIRED FOR INSECTICIDE INVESTIGATIONS. 
There 4 tae from time to paren a! in various Aleta ae aie $3, magazines and other 
1 Eeiar tO gain all the he Earn einivia concerning poisonous plaants thes 
S are always worthy of attention, even though later disapproved, in such vee 
accounts should be sent to this Bureau for record and filing. If a.person or 
ay contain valuable insecticidal constituents and it should be collected, if 
le, and forwarded to Dr. Quaintance, together with all available information 
fing to it.Immediately after being collected, the plants should be dried, each 
f dried material to contain not less than six ounces. The following lis* 
38 some of the plants desired by the Bureau of Entomology: Amanita muscaria 
nanita); Veratrum spp., Sarcobates vermicularis; Aconitum spp.; 
iImlum spp.; Helileborus viridis; Jatropha stimuiosa; Kalmia spp 
Oleander; and the socalled "loco" weeds. A few of the above plants have 
been used to test their toxic action on insects, but the material has been 
ted to permit a thorough test. [N.E. McIndoo.] 
Tarvae of LeConte’s sawfly. (See Forest Insect contribution on page 10) 
COOPERATION DESIRED IN TRAPLIGHT WORK. 
The following is an outline of a project to be followed out in connection with 
ing of a traplight at Hagerstown, Maryland, as arranged by Mr. Hyslop, 
isason for investigations: . 
-It has often been asserted that Lepidoptera only fly to the light after 
oviposition and that in the majority of cases males alone fly. Our obser- 
| vations seem to point to the fact that this conclusion is erroneous. 
Plan for investigation: 
Trap light to be run as often as possible throughout the season. A 
selected number of the most common species to be preserved in alcohol with 
the date of collection for each. This material to be dissected and the 
percentage of males and females of each date tabulated and the presence 
or absence of eggs in the females to be tabulated. 
“Gooperation desired: 
- Tt will be very desireable if other field Laboratories running traplights. 
will place in alcohol the entire catch of the predominant species which 
come to light at that point, with the date of coliection. 
J. A. Hyslop, 
Hagerstown, Maryland. 

