PAPEB I CARRIKER ON MALLOPHAGA 11 



Menacanthus benii, new species 



Figure i-A,c,d 



Types, cf and 9 adults, from Colaptes campestris (Vieillot), collected by 

 the author at Chatarona, Rio Beni, Bolivia, Sept. 22, 1934. Type in 

 USNM. 



Diagnosis: Much smaller than punensis, with an exceptionally small 

 prothorax (9:. 14 X .41 against .217 X .48); head much narrower at 

 both frons and temples ( 9: .303 X .53 against .347 X .586). Temples 

 are smaller and frons more pointed (flatly circular in punensis) ; pterothorax 

 .14 X .488 against .195 X .57; abdomen, 1.12 X .78 against 1.35 X .91. 

 Coxae of all three legs differ in size and shape (see figures). Male geni- 

 talia differ in several details, especially the movable sclerite (see figures). 

 Represented by the 9 holotype, c^ allotype, and 1 cf and 3 99 paratypes. 



Measurements of types are given below. 



M. benii cf M. benii 9 M. pitius cf M. pitius 9 



length width length width length width length width 



Body 1.73 - 1.77 - 1.67 - 2.00 

 Head: 



frons - .40 - .423 - .456 - .467 



temples .305 .50 .303 .53 .33 .586 .358 .61 



occiput .282 - .286 - .307 - .337 



Prothorax .195 .390 .185 .41 .195 .43 .205 .458 



Pterothorax .197 .445 .23 .488 .185 .50 .184 .52 



Abdomen 1.08 .76 1.24 .78 1.09 .74 1.41 .846 



Basal plate .32 .07 .26 .09 



Parameres .146 .02 .143 .015 



Endomeralsac .14 .08 .148 .087 



Menacanthus pitius, new species 

 Figure i:5,a,b 



Types, cf and 9 adults, from Colaptes pitius pitius (Molina), collected 

 by Prof. H. Toro, near Valparaiso, Chile. Type in collection of Catholic 

 University of Valparaiso, Chile. 



Diagnosis: Body much larger than that of benii ( 9: 2.00 against 1.77) 

 and about the same size as in punensis. Head larger than in benii (.358 X 

 .61 against .303 X .53); slighdy longer and narrower than that oi punensis 

 (.358 X .61 against .347 X .63). 



The preantennary portion of head decidedly conical in shape, with 

 rounded tip, with sides but slightly convex, and with the temples wider 

 (longitudinally) than in both benii and punensis. Prothorax smaller than 

 in punensis, larger than in benii; in all three species the different segments 



