No. 1810. DESCRIPTIONS OF NEW MILL1PEDS— COOK. 163 



First segment with surface smooth, not punctate nor striate like 

 the others. Lateral margin nearly straight or slightly emarginate 

 in the middle, the strongly thickened raised margin broadened and 

 slightly produced to a broadly angled corner. 



Surface of segments divided into three bands, the forebelt reticulal e, 

 the midbelt coarsely punctate and the hindbelt smooth, except for a 

 few minute punctations along the midbelt, and a few fine longitudinal 

 wrinkles or grooves. Reticulations limited to forebelt on the dorsal 

 surface, but covering about half of midbelt lower down. 



Penultimate segments distinctly narrowed and shortened, and the 

 punctations less pronounced. 



Last segment nearly smooth with a distinctly triangular produced 

 apex, slightly decurved. Anal valves and preanal scale also smooth. 



Several specimens were collected in a small forest of the Texan 

 palmetto (Inodes texana) not far from the north bank of the Rio 

 Grande, a few miles east of Brownsville. They showed no tendency to 

 congregate in rotten wood, as Arctobolus usually does, but were 

 scattered about in the humus layer, an inch or two below the surface. 

 No other millipeds were found in the same place. 



It is possible, of course, that the Brownsville locality represents the 

 most northern distribution of a species otherwise limited to Mexico, 

 but tins is not to be taken for granted. The Texas palmetto appears 

 to have ranged formerly as far north as Jackson County 



ANELUS RICHARDSONI (Pocock). 



Spirobolellus richardsoni Pocock, Biologia Centr.-Amer., 1908, p. 87. 



A Mexican milliped from Tampico, larger than A. reduncus, but 

 having the last segment shorter and the outer ramus of the gonopod 

 with the terminal prongs very unequal. The females attain, accord- 

 ing to Pocock, a length of 56 mm. and a diameter of about 5.5 mm. 

 The projecting apex of the last segment of A. richardsoni is "a rather 

 wide and flat, apically rounded, caudal process which surpasses the 

 summit of the valves," while the corresponding part of the Texan ani- 

 mal is rather acutely triangular, about as long as wide. The anterior 

 portion of the surface of the segments is not described as reticulate, 

 but "only very finely striolate, " and there is said to be a distinct 

 transverse sulcus or constriction of the segments, which is not true of 

 A. reduncus. Pocock recognizes the improbability of any close 

 alliance between the Mexican species and the genus Spiroholellus, the 

 type of which came from Sumatra. The sexual characters of the 

 original East Indian species of Spirobelellus have not been described. 



GLOSSELUS, new genus. 



Type. — Glosselus musarum , a new species from Costa Rica. 

 Diagnosis. — Apparently related to Anelus, but with the first segment 

 strongly emarginate behind the antennas, the last segment scarcely 



