THE MYIilAPODA OF NORTn AMERICA. 



'ill 



S. SPINIGERUS. 



S. fulvus, maculis saturate viridis maximis ornatus ; capite minute punctato, infra rwnctorum magnoruni serie 



instructo; oculis suborbieulatis; antennis longis; segmentis 48 ; seutis leviter sparse punctatis; squama preanali 



trian"ula. 



o . 



Fulvous, ornamented with very large deep-green macule; bead minutely punctate, furnished inferiorly with a 

 series of large puncta; eyes suborbieular; antennae long; segments 48 ; scuta sparsely lightly punctate; preanal 

 scale triangular. 



S. spinigerus, WooJ, Proc. Acad. Nat. Sci., 186 I, p. 15. 



Fig. 38. 



Fig. 39. 



The color of this species is fulvous, often varying towards orange. On each scutum 

 there is a large dark-green transverse crescentic blotch. This is often so wide superiorly 

 as to involve the whole of the dorsum. In some individuals there are lateral series of 

 white blotches, and occasionally a black line on each side. These are, however, not com- 

 mon. The head has a strongly pronounced median furrow, and is greenish superiorly. 

 The eye-spots are somewhat orbicular, with occasionally a tendency to bec'Sme tetragonal 

 or polygonal. The antenna; are longer than in S. rnarginatus. The scuta are not rough, 

 and are very lightly or even obsoletely furrowed beneath. The spines on the inferior sur- 

 face of the legs are very numerous and acute. The 

 male (Fig. 38) appendages are formed of two main 

 portions joined together, as in S. rnarginatus. The 

 large plate of the main process is broad. The upper 

 border of its face has a wavy outline. Externally 

 it is produced into an alar portion, which ends in a 

 blunt process at right angles to it. The inner piece 

 is composed of a basilar and superior joint. The 

 basilar is very long. The other (Fig. 39) is curved, 



and presents on one aspect a strongly convex, on the other a strongly concave surface. It 

 ends in a blunt point, and is armed with a large blunt process and an acute spine. The 

 female appendage? appear to consist on each side of a process deeply placed within the 

 body, — this is thin on its free margin, which is rounded, though somewhat acuminate ; 

 below it is contracted and thickened. The three pairs of feet immediately in front of the 

 genital aperture in the male have their coxa? produced into long processes. These are 

 often of a curious form, but do not seem constant in this. The fourth and even fifth coxa? 

 have small processes. 



Hub. Florida. South Carolina. — Smithsonian Institution. 



