ART. 8. MILLIPEDS OF CENTRAL AMERICA CHAMBERLIN. 61 



tennae brown. Head fulvous below, brownish above. Collum with 

 caudal and lateral margins forming an evenly convex curve, mar- 

 gined all around. The more caudal of the two transverse sulci a 

 little in front of middle, nearer to the second sulcus than the latter 

 is to the anterior margin (pi. 25, fig. 3). Second tergite margined 

 below and entirely across anterior border. Behind margining slucus 

 with numerous parallel striae, much as in G. multistriatus (C. Koch) 

 (pi. 24, fig. 5). In the following tergites the keels acutely narrowed 

 ventral, with lower ends rounded. The anterior field on these ter- 

 gites is narrow, less than half the width of the posterior, and with- 

 out sulcus, as shown in plate 24, figure 5. 



Seventeenth, eighteenth, and nineteenth (gonopodal) legs of male 

 as shown in plate 24, figures 7 and 8, and plate 25, figures 1 and 2. 



A pleurite from middle region is shown in plate 25, figure 4. 



Length of female, 10 mm. ; width, 6.5 mm. Length of male, 7 mm. ; 

 width, 4 mm. 



Locality. — Guatemala: Trece Aguas (O. F. Cook, July 6, 1907). 



Type.— Cat No. 856, U.S.N.M. 



The median dorsal fulvous stripe appears not to be developed as a 

 rule in young specimens. 



Suborder LIMACOMORPHA. 



Family GLOMERIDESMIDAE. 



Genus GLOMERIDESMUS Gervais. 



152. GLOMERIDESMUS CENTRALIS, new species. 



Plate 25, figs. 5, 6. 



The general color above is brownish black, sometimes lighter. 

 Head yellowish at sides and over lower part of clypeus, elsewhere 

 dark but with an angular yellow mark between antennae, and above 

 this a pair of yellow spots. Dorsum with a median longitudinal 

 series of yellow spots, which are often divided, and a series on each 

 side of this. A row of yellow spots below on each side. 



In general structure and details of head, tergites, legs, and pleurites 

 so closely corresponding to G. 2>oTcellus Gervais and Goudot of Co- 

 lombia and Venezuela that a redescription is unnecessary. The 

 form of the angles of the posterior tergites is shown in plate 25, 

 figure 5. 



This species seems obviously distinct from porcellus in the form of 

 the penes. In porcellus the extended penes in all specimens ex- 

 amined are long and comparatively slender, with a marked tendency 

 to curve, the curvature commonly more pronounced in one than in 



