24 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



strongly curved. Spines 2+2, conical, flattened distad, the outer 

 one on each side a little stouter. 



Length of male 9-10 mm. Length of female 8-9 mm., the average 

 size being less than that of male. 



Pseudomaturus. Body brownish yellow, with the head and caudal 

 segments light orange; antennae and legs yellow. 



Proportions in general nearly as in adult; but in specimen measured 

 head a little longer than wide (47:46). 



Antennae of about same proportionate length as in adults; com- 

 posed of 39 articles in which the series of ten shortened articles follow- 

 ing the second is already present. 



Prosternal teeth 3+3 with relations as in maturus. 



The long bristles of dorsum arranged chiefly along lateral edges 

 and in a transverse row across caudal portion of each minor tergite 

 and of sixth with a few in a transverse row across anterior portion; 

 on ventral plates chiefly confined to a transverse row across anterior 

 border; the hairs elsewhere short. 



Coxal pores 2, 3, 3, 3 ; pigmented. 



Tibial process of first thirteen pairs of legs distinct; no indication 

 of subdivision in tarsi of first twelve pairs; claws as in maturus. 



Anal glands strongly developed. 



Sternite of genital segment with 8-10 bristles on each side. First 

 and second joints of female gonopods each with about four, the third 

 with 2-3 bristles. Claw of gonopods shorter and paler than in adults 

 and more obtuse, well excavated on mesal side. Basal spines smaller 

 than in adult but nearly similarly related, but the inner ones relatively 

 a little smaller. 



Length 7.5 mm. 



Praematurus. Coloration nearly as given for pseudomaturus. 



Head a little longer than wide. 



Dorsum with relatively very long setae along the lateral margins 

 of plates, the one at each posterior corner directed caudad. Each 

 minor tergite with the usual transverse row of bristles along caudal 

 border. Fewer long bristles in a transverse row across anterior border 

 of each ventral plate. 



Antennae relatively shorter than in adult and pseudomaturus. Arti- 

 cles 31 with the series of more shortened ones succeeding the second 

 consisting of but 5, each of which probably would normally divided 

 give to the series the adult number. 



Prosternal teeth 3+3; small and pale; related as in maturus. 



Coxal pores 1, 2, 2, 2. 



