1917] HololeptincB of the United States 371 



of the ridge. These are laid near the position desired and 

 pushed into place with head and mandibles. Every little 

 while the animal stops transporting material, wets the whole 

 mass, pushing it into place with head and body. The last 

 portion of the pupa case to be finished is the anterior end in 

 which a small hole, through w^hich the larva reaches its materials, 

 is left till the last and is then plugged, and cemented rather 

 loosely. In one case the hole was not plugged at all, but 

 remained open after the larva had assumed the prepupal 

 position. When the cell is complete, the larva -closes the open 

 end and gives the entire inside of the cell a coating of the 

 anal secretion, which is colorless when first applied, but rapidly 

 becomes very dark brown ; it then orients itself so that the head 

 end of the pupa shall be opposite the loosely plugged opening; 

 and takes a peculiar prepupal position. The body shortens 

 slightly and the head is bent over and applied to the venter; 

 this fold occurs at the suture between the metathorax and the 

 abdomen. The time taken to become an immobile prepupa 

 is about eighteen hours. The prepupal stage lasts seventeen- 

 eighteen days; but the day before pupation takes place the 

 prepupa raises the head and thorax slightly. The thorax then 

 splits down the back and the pupa emerges. 



Pupa: Length 8-10 mm. Color varying with age, but 

 general appearance white. Imago visible through the trans- 

 parent pupal skin. Spiracles on the second, third, fourth and 

 fifth epipleurites. Genitalia extruded. On the pronotum, an 

 irregular band of fifteen bristles extending distant from the 

 margin along the lateral margin of the thorax to the hind margin 

 half way from center to margin, and an inner row of three 

 bristles. Elytra with scattered bristles, which are definite 

 in number and location. (PI. XXX, Figs. 1-2). Second, third, 

 fourth, epipleurite each with a stout spine. First and second 

 abdominal tergite with a pair of bristles, third with seven 

 bristles (arranged in a triad and two pairs) each side of middle, 

 fourth with two pairs and fifth with one pair each side of the 

 median line. Propygidium and pygidium fringed with bristles. 

 This cha^totaxy is definite in the four specimens before me. 



At the end of the second day after pupation the eyes are 

 colored, by the eighth day the median line of the mesosternum 

 and the median line and segment lines of the abdominal tergites 



