10 U.S. NATIONAL MUSEUM BULLETIN 248 posthdmods 



There are two distinguishing characters: the small spine on lateral 

 margin of prothorax (between the two long setae) is replaced by a slender 

 seta, almost half the length of the long ones ; the pleurites are narrow but 

 distinctly visible, but only the last sternite, which has a deep excavation 

 on anterior margin at each side, can be seen; the anterior fringe of setae 

 around anal opening is extremely short and of almost uniform length (see 

 figure) . 



See key for complete details of separation. Measurements follow next 

 species. 



The following three species are from South American species of Colaptes. 



Menacanthus punensis, new species 

 Figure i:4,a,b 



Types, d^ and 9 adults, from Colaptes rupicola puna Cabanis, collected by 

 the author at Obrajillo, Peru, Nov. 18, 1929. Type in USNM. 



Diagnosis: The frons is quite circular, much more so than in colaptis; 

 the ocular slit is completely covered by dorsal membrane; the prothorax 

 is much wider than in colaptis; first coxae very large, second and third very 

 small, while there is the usual small spine on lateral margins of prothorax 

 (not a rather long seta between the two very long ones). Male genitalia 

 are also distinctive (see figure). It may be noted that the three new species 

 here described from the genus Colaptes all have similar coxae, the first 

 pair large, the second and third unusually small and oval, smaller and of a 

 distinct shape to those of M. colaptis (Durrant). Species represented by 

 9 holotype, cf allotype, and 3 cfcf and 10 99 para types; also 3 cf cf 

 and 3 99 from Colaptes rupicola cinereicapillus, collected at Yanac, Peru, 

 which cannot be separated from type series described above. 



Measurements are given below. 



