76 



Bulletin 64. 



struct the typical cylindrical nest (Fig. 7), composed of web and 



an outer layer of bits of dry grass. The bits of grass are cut with 



great regularity, being about 2 mm. by 75 mm. 



In these nests the larvae retire when not feeding. 



The larvae feed upon the common grasses. Some 



were observed to eat considerable sheep sorrel 



{^Rumex acetoselld). The larvae feed mostlj^ at night 



and occasionally a blade of grass was cut off and 



the end drawn into a nest. As cold weather came 



on the larvae became more dormant, the nests 



were made thicker, and finally in November the 



tops of the nests were closed. The winter is passed fig. i~Nest of 



in the larva state. In the spring the larvae com- piVA'us/en- 



plete their growth and then transform, and emerge ^'^''^^'^■ 



in July. 



E^g. — Creamy white when first laid, gradually turning to a pinkish red 

 color before hatching. Form elliptical oval ; size .40 mm. by .30 mm. The 

 egg shell has twenty longitudinal ridges and numerous small transverse ridges. 

 PI. XII., Fig. 19. 



Larva, first stage. — Head diameter .2 mm.; body diameter .125 mm.; 

 length .99 mm. General color a smutty white ; head a little darker than tbe 

 rest of the body. Scattered dark hairs occur on the head; numerous small 

 dark colored tubercles occur on the body, each bearing at least one hair 



20. The White Crambus. 

 Crambus albellus. 



20. 



PLATES III., IX., XII., XIV., Fig. 



This insect may be recognized by its white color with a few 

 pale oblique markings, and by its small size. The adults fly flie 

 greater part of June and July. They fly mostly in the latter part 

 of the afternoon and more or less during the whole of cloudy days. 

 They rarely fly at twilight and therefore are not attracted to 

 lights. During the two seasons trap lanterns were run by the 

 Experiment Station only two males were taken. When found in 

 the grass the moths rarely attempt to fly, but remain quiet till 

 there is an opening, when they quickly glide out of sight among 

 the dead grass. This insect is confined almost exclusively to 

 high, rather dry land ; they are most abundant in open fields. 



