312 Annals Entomological Society of America [Vol. IX, 



larvae as parasitic in spiders of the genus Lycosa which he had 

 under observation. One male and six female spiders were 

 found to be parasitized and in one case two larv^ issued from 

 a single spider. This observer notes that a short time before 

 the parasite escapes from the body of its host, the spider acts in 

 a peculiar manner, walking about spasmodically and often 

 spinning aimlessly. After the soft parts of the body of the 

 spider are eaten away the parasite emerges through a hole 

 which it makes in the abdomen; this emergence kills the host. 

 The bulk of the body of each parasite is noted as being almost 

 equal to that of the abdomen of the host. 



THE PUPA OF PTERODONTIA. 



The pupation of the larvae took place July 21, or the day 

 after the larvae left their hosts. The pupa (Fig. 9) was 6 mm. 

 in length and when first formed was light creamy-white, but 

 soon after it turned to a pale yellowish-brown color. The sur- 

 face is smooth, shining, and without setae or spines except for a 

 prominent V-shaped crest on the head. This is composed of a 

 large number of irregularly barbed, clublike processes (Fig. 9a). 

 The various adult parts, as the rounded head which is quite 

 prominent, the wings, tegulae and legs are quite distinctly 

 outlined in the pupa. On the cephalo-lateral aspect of the 

 thorax there is a single pair of spiracular projections and caudad 

 of these the thorax is elevated into a rounded hump. The 

 abdomen consists of eight segments, the anterior three each 

 bearing a pair of elevated spiracles. The caudal segments are 

 telescoped into the preceding segments, giving the abdomen a 

 truncated appearance. The lateral line caudad of the third 

 spiracle is marked by a dark furrow. The duration of the pupal 

 period was seven days. 



LITERATURE ON THE PUPyE OF THE CYRTID^. 



The pupa of Astomella lindenii has been described by 

 Brauer (2). It differs from the pupa of Pterodontia in several 

 characteristics; namely, the head is less prominent and lacks 

 the crest of spines ; the thorax bears on the dorso-meson a row 

 of spines. The abdomen shows seven segments, the first six of 

 which bear spiracles. The empty pupal case is dark brown 

 spotted with light yellow. 



