MILLIPEDS OF PANAMA—LOOMIS 109 
Family Stemmiulidae 
Genus Prostemmiulus Silvestri 
Prostemmiulus Silvestri, Boll. Lab. Zool. Portici, vol. 10, pp. 313, 323, 1916. 
Prostemmiulus oculeus, new species 
FIGURE 6c—e 
Houotypr: Male, USNM myriapod collection 2647, El Valle, 
Panama, March 22, 1958, E. M. and H. F. Loomis. 
Paratyprs: 2 females, author’s collection, Juan Dias, Panama, 
June 3, 1923, O. F. Cook and H. F. Loomis. 
Draanosis: The gonopods more closely resemble those of P. mexi- 
canus Silvestri than any other member of the genus but are obviously 
different. Also the large eyes and striations of segment 1 further 
distinguish this species. 
Descrirtion: Length 23 to 29 mm., width 2 mm.; number of seg- 
ments 48 or 49; body with segment 2 widest, slightly constricted 
thereafter and narrowest at segment 5 behind which the shape is 
fusiform; anterior two-thirds of body terete, the posterior third 
laterally compressed. 
Head with ocelli large with the lower one more than half the di- 
ameter of the other, almost touching the antennal socket (fig. 6c); 
furrow of vertex short, not reaching a line that would join tops of 
antennal sockets; antennae with joint 2 nearly as long as joints 3 and 
4 together; joints 3 to 6 subequal in length. 
Segment 2 with two strong lateral striae, the back one longest; 
on succeeding segments the oblique striae do not reach onto the dor- 
sum until segment 14 or 15; median dorsal sulcus very strong and 
ending in a tiny inconspicuous notch of posterior margin; last segment 
a little more than half as long on dorsum as preceding segment. 
Gonopods and second male legs as shown in figure 6d-e; third 
legs with joints 2, 3, and 4 expanded vertically but little thicker than 
those that follow. 
Genus Stemmiulus Gervais 
Stemmiulus Gervais, Ann. Soc. Ent. France, ser. 2, vol. 2, p. xxix, 1844. 
Stemmiulus canalis Chamberlin 
Ficure 6f 
Stemmiulus canalis Chamberlin, Bull. Univ. Utah, vol. 30, No. 9, pp. 14-15, 1940. 
Canal Zone, many specimens from the following locations: Barro 
Colorado Island, June 6, 1923, O. F. Cook and H. F. Loomis; March 
8-15, 1958 E. M. and H. F. Loomis; Pifia area, March 18, 1958. 
H. F. Loomis. 
577689—61——3 
