_I 3 6— 



.small for want of food, or after the depositing of eggs. In nearly all 

 specimens either one, two, or three, or more pair of circular depressions 

 can be seen. When the abdomen shrinks the space between the de- 

 pressed dots of each pair becomes depressed in the form of a rectangle 

 as seen in Hentz's figure of Mygak solslitialis. The difference in color 

 of the two is not of specific importance, for the young of P. carabivorus 

 have a brownish ceph'x, the old a glossy black, and when transferred to 

 alcohol, this soon changes to brown. 



Pachylomerus turris, n. sp. Q, 1 specimen, (PI. V, fig. 5.) 



Ceph'x 6.5 mm. long x 6 mm. broad. Marginal configuration as in /'. carabiv- 

 orus; lateral radial depressions in form of crescents with the concavities caudad; 

 anterior radial depressions indistinct, but marked by a deep, small cylindrical punct- 

 ure; armature same as P. carabivorus, with the exception of the lack here and there 

 of a few spines, which may be accidental. 



Sternum nearly as broad as long, distinctly angled between articulations of coxae. 

 1 .abium shorter than broad at base, nearly triangular, separated from sternum l>y 

 a furrow. 



Eyes. Upon the arrangement of the eyes is laid the greatest stress in establish- 

 ing this species. Ant- and post-laterals forming a rectangle; posterior row curved 

 with the convexity caudad. 



Tuft of hairs on clypeus with few hairs; also very few hairs, or signs of their 

 having been any, in the three lines caudad of the eyes. 



Pachylomerus 4-spinosus, n. sp. (PI. V, fig. 21.) 



Eyes as in P. carolinensis. Legs 4, 1, 3, 2, tibia III with depression at prox- 

 imal end, but distal end not enlarged as in the other species. Armature very distinct 

 from the other species. Patella IV with a number of spines; distal end of patella and 

 metatarsus III, two spines; two on proximal end of metatarsus and two or three on 

 distal end of tibia III; row of spines on each lower side of II and I, arranged thus in 

 each row, one on tarsus, two on metatarsus, and two on tibia; palpus with a row on 

 each lower side, arranged 3 on tarsus, 2 on tibia, one on patella, and one on femur. 

 Spines at base of maxillae and on labium as in the other species of Pachylomerus. 

 All the spines on the legs are medium length, and not short as in the other species. 

 Ceph'x and legs pale rufous, abdomen light brown. Specimens young. Palpal claw 

 is shown in fig. 21, plate V, at base is a large short spine, which has four divisions at 

 the terminal end, the distal one the longest, and the others decreasing successively 

 in length. 



EXPLANATION OF PLATE V. 



Fig. 1. Ceph'x of Pachylomerus carabivorus. 



" 2. " " " carolinensis. 



" 3. Eyes of " " 



"4. « «« " carabivorus. 



"5. " " " turris. 



" 6. Myrmekiaphila foliata, dorsal view. 



" 7. " " eyes of. 



"12. " " maxilla of. 



•' 14. " " side view. 



