14 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



the cephalic plate. Labrum free, tripartite. Median piece large, 

 protruding caudad, and armed with a series of long teeth. Lateral 

 pieces fringed with pale spinescent processes. First maxillae with 

 inner and outer branches distinctly set off from coxal plate. Outer 

 branch biarticulate, with two long membranous lappets. Second 

 maxillae with coxae completel^y and broadly united at middle, as in 

 Nesidij)hilus^ though the median part is commonly more membra- 

 nous. Coxopleural suture strongly chitinized, anteriorly curving 

 about ectal edge of pore, where it may be only weakly indicated. 

 Ventral sclerites strongly developed, extending far forward and 

 united at anterior end by a small median piece. Palpus triarticulate, 

 terminating in a simple smooth claw; none of joints with a process. 

 Prehensors large, exposed from above and extending beyond front 

 margin of head. Claw and femuroid armed within and prosternum 

 armed anteriorl3\ Prosternum without chitinous lines. Ventral 

 pores normally in four areas, one on each quarter of plate, as in 

 Nesidiphilus, etc. Last ventral plate narrow. Coxopleurae of last 

 legs elongate, usually considerably exposed from above, and bearing 

 very numerous small pores. Anal legs with six joints beyond coxae, 

 clawless. 



Genotype. — Suturodes tardus^ new species. 



This genus differs from the West Indian genus Nesidiphilus in the 

 position of the coxopleural suture, this in the latter genus always 

 ending at the margin mesad of or caudomesad of the pore, as also it 

 does in the closely related Telocriciis (pi. 4, fig. 5), whereas in the 

 present group this suture curves about the ectal edge of the pore in 

 the more usual manner (pi. 3, fig. 4). 



41. SUTURODES TARDUS, new species. 



Plate 2, fig. 5 ; plate 3, figs. 2, 3, and 4 ; plate 4, figs, 8 and 4. 



Flavous, the head and prehensors and a few anterior tergites typ- 

 ically of a dilute chestnut tinge. Head about 1.68 times longer than 

 wide; widest at caudal end of frontal region, from where the sides 

 are parallel or converge but slightly caudad to the oblique caudal 

 corners and more strongly forward. iVnterior margin a little con- 

 vex at middle. Caudal margin straight (pi. 4, fig. 3). Articles of 

 antennae moderately long, the ultimate clearly shorter than the two 

 preceding taken together. No distinct clypeal areas excepting the 

 small, pale spots from which the principal, more median setae arise. 

 Ectad of each of these setae of the median pair a series of three or 

 four setae and in front of them and between the antennae a second 

 pair. Caudad of the main transverse series of setae a second series 

 of smaller setae, these 3+3 or 3-f 4. Caudad of this second series 

 two setae on the median line, one behind the other, with sometimes 



