334 



PROCEEDINGS OF THE ACADEMY OF 



[April, 



Measurements. 



Length of body, 64 . mm 



Length of prothorax, 2.8 



Length of mesothor ax, 13.0 



Length of metathorax (incl. med. segm.), 11.0 



Length of cephalic femur, 20 . 5 



Length of median femur, 12.0 



Length of caudal femur, 16.0 



The type is unique. 



PHTHOA Karsch. 

 Phthoa occidentalis n. sp. 



Type: 9 ; Massamedes Province, Angola. [Acad. Nat. Sci. Phila., 

 type No. 5,173.] 



Differing from P. prolixa Karsch from Mpwapwa, German East 

 Africa, the type and only other species in the genus, in the greater size 

 and triangularly emarginate seventh ventral abdominal segment, 

 which latter is supplied laterad with decidedly acute triangular lobes, 

 instead of being shallowly arcuate emarginate as in prolixa. 



Size rather large; form moderately elongate; surface smooth, an 

 indistinct medio-longitudinal carina present. Head about twice as 

 long as the prothorax, distinctly narrowing caudad ; interocular region 

 slightly inflated; occipital margin moderately impressed mesad; 

 eyes subglobose, hardly prominent; antennae less than one-third the 



Fig. 8. — Phthoa occidentalis n. sp. Lateral view of apex of 

 abdomen ( $ ). (X 5.) 



Fig. 9. — Phthoa occidentalis n. sp. 

 abdomen ( $ ) . 



Ventral view of apex of 



(X 5.) 



length of the cephalic femora, seventeen- to eighteen-jointed. Pro- 

 thorax with the dorso-lateral margins sinuate and converging cephalad, 

 cephalic margin arcuato-emarginate, caudal margin emarginato- 

 truncate. Mesothorax two-thirds the length of the cephalic femora. 



