214 bulletin: museum of comparative zoology. 



This is a lighter colored species than the common North American 

 species, A^ miinihim, being mostly of a dilute ferruginous brown color 

 with some darker markings especially in the anterior region, the dark 

 areas commonly embracing many light spots or forming a network; 

 in some a series of small dark dots over the repugnatorial glands may 

 be traced over the anterior region of the body. 



The body is longer and proportionately more slender than in N. 

 vmnihnn. The somites are much more obviously constricted along 

 the suture, the encircling furrow being conspicuous. 



The eye-patch is more narrowly oblong, the length being subvertical. 

 The ocelli are arranged typically in but three vertical, slightly curved 

 series: e. g., 9 + 8 + 6 to 7 + 4 + 1. 



Length, up to 16 mm. 



The specimens from Port of Spain (Roland Thaxter) are darker 

 than those from the Cave. 



151. Julus curiosus Karsch. 

 Zeits. naturu'iss., 1881, ser. 3, 6, p. 1.5. ^ 



In this species the repugnatorial pores lie in front of the transverse 

 sutures and the anal tergite does not surpass the valves. Collum 

 widely rounded. Sulci deep. Striate behind sutures, smooth in 

 front. Pores scarcely above middle. 



Number of somites forty-seven. 



Length 36 mm. 



Habitat. — Porto Rico.^ 



The generic or even family position of this and the following form 

 cannot be determined with entire certainty until the types have been 

 restudied or the species found again. They are not congeneric. 



152. Julus caesar Karsch. 



Zeits. naturwiss., ISSl, ser. 3, 6, p. 18.' 



In this form the repugnatorial pores lie caudad of the transverse 

 sutures and the caudate anal tergites surpass the valves a little. 

 Collum angularly rounded. Segments striate on both sides of suture. 

 Pores high above middle. 



Number of segments, sixty. 



Length, 70 mm. 



Habitat.— Porto Rico.^ 



