18 BULLETIN 746, U. S. DEPARTMENT OF AGRICULTURE. 



of the female are white. The wings are narrow, outer margin oblique, apes 

 pointed. The male is brownish ochre in color, the female straw yellow ; the two 

 rows of brown dots are distinct in both sexes. 



Range: Mexico, numerous localities, Gulf States, and lower Mississippi 

 Valley. 



Grote's crambidoides was described from Kansas, so there can hardly be any 

 doubt of the application of the name. Walker's Uncosellus was described from 

 Honduras, whence I have no material. If the names shall be found to refer 

 to the same form, Walker's name would have priority. 



INSECTARY METHODS. 



Experiments with the sugar-cane moth borer were conducted at 

 New Orleans in a room open on all sides, wire screen taking the place 

 of walls and allowing free access of air and moisture. 



Cylindrical cages of wire screen were used for the adults. Shortly 

 after emergence the moths were transferred to these cages, which 

 were made by sewing together with wire the edges of pieces of ordi- 

 nary window screen, these pieces being cut of such a size as to form 

 cages about 7 inches high by 6 inches wide. Some of the horizontal 

 strands of wire were pulled off the top and pieces of cheesecloth were 

 stretched across so that the exposed ends of the vertical wires would 

 extend through the cloth, thus holding it firmly in place. These cages 

 were placed over saucers of damp sand, and the adults were supplied 

 with young cane or corn leaves in tubes of water for oviposition. The 

 females laid eggs readily on the leaves and also on the sand and the 

 sides and tops of the cages. 



The leaves with the masses of eggs were then transferred to speci- 

 men jars about 3^- inches wide by 12 inches high, covered with cheese- 

 cloth. On hatching, fresh food was supplied as needed, and the 

 young larva? were allowed to remain until after the first molt, when 

 they were transferred to individual tubes. These were about half an 

 inch in diameter by 7 inches long, made by breaking ordinary glass 

 tubing. One larva, with pieces of fresh stalks of cane or other food 

 plants, was placed in each tube, the ends of which were firmly plugged 

 with cotton batting. A number of tubes were placed in a cigar box, 

 the dark interior of which was somewhat similar in degree of illumi- 

 nation to the interior of a cane plant. The actions of the larvse were 

 easily observable through the glass. The tubes were very easily 

 cleaned by forcing a wad of cotton through them from end to end 

 with a rounded stick or plunger. 



The pupae were placed on damp sand under ordinary drinking 

 glasses. 



Temperature and humidity apparatus used in the experiments were 

 maximum and minimum thermometers, sling psychrometer, and re- 

 cording hygrothermograph. 



