Machiganga Indians of the San Miguel Valley 67 



Stature Span and Indices. 



Eighteen males and fifteen females were measured. The 

 average height for the male is 1559 mm., the tallest was 1627 

 and the shortest 1505, giving a variation range of 122. The 

 Machiganga therefore belong to Topinard's "Low Stature" 

 group and are shorter than the Quichua (1583). 



The female Machiganga shows an average height of 1439 mm., 

 which is somewhat less than that of the Quichua female (1454), 

 with extremes of 1530 and 1153, and a variation range of 377. 

 This is an average difference in favor of the male of 120 mm., 

 which is the same as the sex difference in the Quichua (120). 

 The much greater variation range in the female than in the male 

 is probably incident to the small number of individuals measured, 

 as no similar sex difference was noted in the Quichua and has not 

 been described in other races. 



The seriation table of heights shows that 89% belong to the 

 low stature group, 11% are of medium stature and none 

 belong to Topinard's "tall group" above 1700 in height. But 

 the number of individuals included is too small to give definite 

 results. The Machiganga is of about the same height as the 

 Igorot (1549, Bean) and the Laplander (1558, Anutschin) and 

 the Labrador Eskimo (1552, Hrdlicka). At the end of the article 

 will be found tables giving the various measurements, the 

 averages, extremes, ranges of variation, and seriation lists. 



The greatest span in 18 males was 1635 mm., the least 1454, 

 with a variation range of 181 and an average of 1559. The span 

 shows a greater variation range than the height (122). In the 

 15 females the greatest span was 1521, the least 11 38, the varia- 

 tion range 383 and the average 1424. Here again as in the 

 height the variation range is considerably greater in the female 

 than in the male. 



The former expedition found that in the male Quichua the 

 average span was 1621. The span on the average was greater 

 than the height by 36, the greatest excess of span over height 

 was 117, the greatest excess of height over span was 102 mm. 



In the Machiganga male the average span is equal to the 

 average height. The greatest excess of span is 60 millimeters 

 and the greatest excess of height was 86 mm. In the female the 

 span is 15 mm. less than the height on the average. The great- 



