S. Mahunka szerk.: Folia Entomologica Hungarica 44/1. (Budapest, 1983)

It appears from the table that very few measurements were uncorrelated with the body size simultaneously in both populations. Most of them pertained to distances measured along the surface of the integument. This was particularly apparent for structures on ventral hysterosomal plates of a female. Table 5. Correlation of morphological character measurements of Tarsonemus nodosus (Xj) with the body size of the mite (y)

x as expressed by correlation coefficient r Sex and source of the mites No. characters investigated No. r' s significant at P 0.05 No. of significant coefficients the range r 0.5 0.5 r 0.7 r„„. within y

x

i r 0.7 Field males 83 76 11 25 40 Laboratory males 83 78 9 25 44 Field females 65 57 12 23 22 Laboratory females 65 55 12 19 24 y = x

3

4 . X35 in males y = X£9 . X30 in females C critical values at 0.05 : r = 0.362 0.01 : r = 0.439 Table 6. Distribution of character measurements little or not correlated with generalized body size of the mite Tarsonemus nodosus Schaar. males females No. measurements character No. measurements character Kind and location with r

X

y 0.5 no* s with with r

X

y 0.5 no' s with of a character r 0.5 r 0.5 field lab. in both field lab. in both populations populations General measurements _ _ _ 5 2 (5), (6) Dorsal setae lengths 1 2 " " distances 6 3 (17), (25), (26) 1 Ventral setae lengths 1 1 3 (36) " " distances 4 4 (48), (49) 1 3 (40) Dorsal shields 1 1 _ Ventral plates protero(6) 1 (7) somal 1 1 (6) 1 2 (7) Ventral plates hystero(31), (61), (62), somal — 5 5 (31), (61), (62), (63), (64) Legs I-III segments 4 1 (71) 1 " specialised setae 2 1 (69) 1 1 Legs IV segments 1 2 (65) " setae 1 1 _ Pseudostigmal organ X X X 2 2 (34), (35) Total 18 14 20 22