PAPEH IV CARRIKER ON IVIALLOPHAGA 39 



The male genitalia of the five species represented by males are of the 

 same general type but they differ radically in many details, as may be seen 

 in the figures. 



Considering the above, together with the differences in the shape and 

 size of the head of the three females described in 1 950, it seems best to give 

 all of them specific rank. I feel certain that when the male of those species 

 known only from the females is secured that their genitalia will prove to 

 be distinct from those of the five known males. 



KEY TO THE SPECIES OF CRACIMENOPON PARASITIC ON ORTALIS 



Females 



1 . Width of head anterior to ocular slit, 0.39 mm.-0.41 ; at temples, 0.585-0.63 . 2 

 Width of head anterior to ocular slit, 0.434-0.446; temples, 0.64-0.677 ... 6 



2. Head with wide, circular frons; pleurites comparatively narrow, with rather 



long, slender spines; occipital nodi without long, lateral, pointed wings. 



C. wagleri 



Head with narrow frons, either flatly rounded or sharply circular; occipital nodi 



with prominent lateral wings 3 



3. Frons sharply circular 4 



Frons flatly rounded; head triangular 5 



4. Small body, 1.76 X 0.76; head width at temples, 0.585; width of distal ab- 



dominal segment, 0.41 C. caquetae 



Larger body, 1.97 X 0.91; head at temples, 0.63; distal abdominal segment, 

 0.456 C. huilensis 



5. Pleurites large, somewhat quadrangular, with short, blunt spines; head, 0.39 



X 0.60; frons, 0.39 C. spiculum 



6. Large species, body, 2.15 X 0.90-0.93; head, 0.43-0.45 X 0.64-0.67; frons, 



0.44-0.446 7 



Small species, body 2.02-2.06, head, 0.42 X 0.66-0.67; frons, 0.434 .... 8 



