NEOTROPICAL MALLOPHAGA — CARRIKER 415 



For measurements sec table 1 (p. 429). It has not seemed necessary 

 to present measm-ements of the male genitalia. 



The species is represented only by the male holotype and female 

 allotj^pe. 



Forniicaphagus laemostictuSf new species 



Figure 2,o 



Type : Female adult from Myrmeciza laemosticta bolivari de Schau- 

 ensee, collected by the author at Puerto Valdivia, Antioquia, Colombia, 

 May 4, 1948 (USNM). 



Diagnosis: One of the larger species (body, 1.89 X .52; head, 

 0.495 X 0.485), with head longer than wide, the reverse of F. pictu- 

 ratus. The preantennal margin of head is straight; the anterior plate 

 is much wider in anterior portion, where the sides are convex, while 

 in posterior portion the sides are straight and parallel; a small, darker 

 colored shield covers anterior portion, this character being present in 

 but three of the known species of the genus. 



The premarginal carinae are very wide, and there are well-de- 

 veloped postmarginal carinae not present in all species. 



The sides of both thoracic segments straight, with pterothorax 

 narrower and less divergent than in picturatus (0.395 against 0.412); 

 sides of posterior margin of pterothorax straight, with acute median 

 point. 



Abdomen rather long and slender (1.16 X 0.52); pleurites pitchy 

 black (except pleurite I) and of medium width, with "heads" very 

 short on dorsal portion and long on the ventral portion, Tergites 

 and sternites faintly pigmented except genital plate and sternite V; 

 setae along posterior margin of genital plate short and peglike. The 

 patch of setae at each side of sternite VIII consists of a row of seven 

 setae set parallel to margin, and pointing diagonally backward and 

 inward, and with two others between this line of setae and the margin 

 of segment, pointing backward. 



The species is represented by the male holotype, one female para- 

 type, and one female from another individual of the type host col- 

 lected at Zaragoza, Antioquia, Colombia. 



Formicaphagus magnus, new species 



Figure 2,6 



Type: Female adult from Myrmeciza laemosticta palliata Todd, 

 collected by the author at La Palmita, Norte de Santander, Colombia, 

 Aug. 14, 1916 (author's collection). 



Diagnosis: Distinguished by the large head, very large anterior 

 plate, partiall)^ pigmented premarginal carinae and nodi, and narrow, 

 faintly pigmented abdominal pleurites. The head is longer than 



