298 Annals Entomological Society of America [Vol. XV, 



Description of a New Species. 



Paeromopus chamberlini n. sp. 

 (Figs. 53-57). 



cf. Length about 111 mm.; diameter 4.60 mm.; 79 segments, of which 1 

 apodous; 149 pairs of legs. — Adult. 



cf. Length about 93 mm.; diameter 5.12 mm.; 71 segments, of which 

 2 apodous; 131 pairs of legs. — Adult. 



Mount Shasta, California. 



Pleural regions black, or at least very dark brown; a broad lively 

 orange band runs dorsally from the first tergite to the last, almost 

 entirely filling the space between the pores ; the band thins out anteriorly ; 

 posteriorly it covers the margins of the anal valves. Clypeus fulvous, 

 with yellow margin. Limbs brownish. 



Labral plate very obvious, the anterior margin of the clypeus being 

 somewhat swollen; mesal notch deep. Clypeus elongate, almost three 

 times the length of the epicranium; surface rather flattened, leathery, 

 with but few setiferous punctures, of which a pair stands in a line with 

 the antennse. Epicranium unusually short, longitudinally rugose, 

 divided by a distinct sulcus. A less marked transverse sulcus connects 

 the inner angles of the eyes; behind, and in contact with it is the usual 

 pair of setiferous dimples which is formed by coupled punctures. 

 Antennse long, yet not extending over the fourth segment; measures of 

 joints as below: 



1st joint, length 0.256 mm.; 



2d joint, length 1 .344 mm.; diameter 0.544 mm. 



3d joint, length 1.728 mm.; diameter 0.544 mm. 



4th joint, length 1.440 mm.; diameter 0.448 mm. 



5th joint, length 1.374 mm.; diameter 0.480 mm. 



6th joint, length 1.184 mm.; diameter 0.480 mm. 



7th-8th joint, length 0. 192 mm. 



Total length 7.518 mm. 



Ocelli distinct, numbering about 22 (7, 6, 5, 4), collected on a sub- 

 triangular field. Mandibular stipe (Fig. 53) almost quadrate, not 

 longer than high, produced ventrally and with its anterior angle some- 

 what angular. Gnathochilarium as in female lysiopetalinus, i. e., 

 with intermentirm and without postmentum. 



Collimi strewn dorsally with numerous, moderately coarse punctures. 

 Lobes small, angular, marked with four or five short and thin sulci. 

 Following segments very much as in lysiopetalinus, the metazonites 

 bearing sulci intermingled with punctures; sulci strongly impressed 

 anteriorly, less deep but more numerous backwards. First pore on the 

 sixth segment; the five or six anterior pores are located behind, and in 

 contact with the suture, which is slightly sinuous; further caudad the 

 pores and more and more removed from the suture, so as to open in 

 the first and third of the metazonite. Last tergite very short; its 

 posterior margin is thick and scarcely produced, leaving uncovered the 



