32 MARGUERITE HENRY. 



segments in the female; the length of the caudal rami; 

 the presence of a long spine on the basal segment of the 

 fourth leg iu the female and the structure of the last pair 

 of legs in the male. 



Gladioferens spinosus, sp. n. 

 (Plate I, figs. 1-7.) 

 The average length of the female, not including the 

 caudal rami, is 1*3 mm. 



The general form of the body is moderately robust, with 

 the two chief divisions sharply marked off from each other. 

 Seen dorsally, the cephalothorax is of oval form, with the 

 greatest width a little behind the middle; it tapers more 

 anteriorly than posteriorly. The head is narrowly rounded 

 in front, and projects below in a fairly well marked rostral 

 prominence. The last thoracic segment is rather short and 

 has the lateral parts slightly expanded into two rounded 

 lobes; each lobe bears a spine and sometimes one or two 

 smaller spines in addition. 



The abdomen is long and slender, composed of four 

 segments. The genital segment widens posteriorly and is 

 expanded into two small rounded lobes; there is also a 

 slight rounded projection on each side at about the middle; 

 a group of bristles is present on each of these four projec- 

 tions. The prominence on the ventral surface of this 

 segment is not very protuberant. The second segment is 

 short and somewhat rounded; the third is longer than the 

 second and is rectangular; the fourth is about the same 

 length as the second. The caudal rami are very long and 

 slender, equalling the length of the last two segments 

 combined. They are divergent and bear hairs on their 

 inner and outer edges ; those on the inner edges being the 

 longer. The outer edge on each side has a ledge to which 

 one of the caudal setae is attached ; the remaining four 

 setse issue close -together from the truncated end of each 

 ramus. They are all about the same length. 



