170 DIPLOPODA. 
segments are only very weakly tessellated in the way above described and the transverse sulcus begins 
on the 4th; 19th segment weakly tessellated. Caudal process of 20th conical, apically truncate ; 
sternal plate triangular, the apex not spiniform. Sternal areas of segments wide, slightly wider in front 
than behind, posteriorly lightly emarginate; but upon the posterior segments more strongly so, the 
sternum of the 19th and in a lesser degree of the 18th being angularly excised behind. Sterna and legs 
hairy. Anterior sterna of § without tubercles or processes. Genital process of second leg short and 
blunt. Phallopods moderately long, robust, ending in two branches—an external, slender, attenuated, 
pointed, and downcurved in its distal half (the seminal stile) ; and a larger internal, which is broad and 
bent sharply downwards proximally and then abruptly forwards and slightly outwards distally, the 
extremity being narrow and pointed. Fossa of phallopods wide, with strongly elevated thin posterior 
border. Coxe of legs of 7th segment widely separated. 
¢@. Like the male, but a little larger and with the keels considerably less expanded (head and first three 
segments missing in only specimen available). 
Length, ¢, 30 millim., width 3°5. 
»  @, about 35 millim. (damaged), width 4:2. 
Hab. Guatemata, Senahu in Alta Vera Paz (Champion). 
2. Eutyporhachis oltramarei. 
Leptodesmus oltramarei, Carl, Rev. Suisse Zool. x. p. 600, t. 10. fig. 34 (1902) *. 
Colour yellow or brownish yellow; sterna and appendages clear yellow. (Head and first tergal plate 
unknown.) Ace/s small, not much surpassing the posterior border of the median area of the segments, 
their anterior border forming a continuous arch with the anterior half of the lateral border. On the 
keels without pores the hinder angle is rectangular with the short posterior border of the keels. 
On the pore-bearing segment the pore-area forms an oval thickening, which projects a little beyond 
the border of the tergal area as a blunt anguliform process. Dorsal surface lightly vaulted, shining ; 
the metazonites with central transverse groove ; area in front of the groove smooth or at most lightly 
coriaceous ; area behind it with two rows of tubercles, the first row consisting of six larger tubercles, 
the second row of eight smaller tubercles, which extend beyond the posterior edge of the tergal plate. 
Externally to the ends of the suleus there is a small swelling. Legs long and thin, sparsely hairy. 
Phallopods moderately long; the distal segment divided into two unequal branches; the subsidiary 
branch is inferior, subcylindrical, and apically attenuated. The principal branch is longer and stronger 
and is itself divided distally into two, one of which (the seminal stile) is narrowed and slightly down- 
bent apically, while the other is expanded into a funnel-shaped lamina, the cavity of which looks 
outwards and upwards and guards the seminal stile on the inner side. 
Length about 20 millim., width 1-8-2. 
Hab. Guaremata (Oltramare '). 
Subfam. RHACHODESMINA. 
Rhachidesmine *, Carl, Rev. Suisse Zool. xi. p. 558 (1903). 
Phallopods without coxal calcar, usually excavated on the inner aspect of the femoral element. Generative 
processes of second leg in male long, slender, and projecting backwards. 
Distribution. Central America. 
* Although Carl employed the term Rhachidesmine for this section, the genus Rhachidesmus does not. 
appear amongst the genera included under it. He retains the preoccupied name Rhachis, for which Cook had 
substituted that of Rhachodesmus. 
