312 ENTOMOLOGICAL SOCIETY 



EXPLANATION OF PLATES. 



Plate IV. 



Erithophilus neopus. 

 Fig. ia. Head, dorsal view. 



\b. Anal legs, ventral view. 



ic. Ventral and pleural sclerites of segments 10 to 12. 



\d. Labium and maxillae, ventral view. 



Polycricus floridanus. 

 Fig. 2a. Head, dorsal view. 

 2b. Same, ventral view. 

 2c. Prehensorial leg more magnified. 

 2d. Labiutn and maxillae, ventral view. 

 2e. Same, dorsal view, more magnified. 

 2f. Anal segment, ventral view. 



Pectiniunguis americanus. 



Fig. 3#. Anal segment of female, ventral view. 

 Holitys neomexicana. 



Fig. 4. Anal segment of female, ventral view. 

 4#. Anal leg of female, lateral view. 



Plate V. 



Ityphilus lilacinus. 

 Fig. \a. Head, dorsal view. 

 \b. Same, ventral view, 

 ic. Prehensorial leg, ventral view. 

 \d. Anal segment, ventral view. 

 \e. Ventral pores. 



Diplethmus mexicanus. 



Fig. 2a. Ventral and pleural sclerites, the dotted circles showing the lo 

 cation of the ventral pores. 

 2b. A cluster of ventral pores. 

 2c. Head, dorsal view. 

 2d. Antenna. 

 2e. Anal segment, ventral view. 



Ballophilus clavicornis. 



Fig. 3. Head and first three segments, dorsal view. 

 3#. Maxilla and half of labium, dorsal view. 



3c. Three segments, ventral view, showing the prominent, trans 

 versely elliptical pore-areas. 

 3^. One of the pore-areas more magnified. 

 32. Anal segment, dorsal view. 

 3/i Same, ventral view. 



