This data is from a paper by A. A. Lubischew, "On the Use of Discriminant Functions in Taxonomy", Biometrics, Dec 1962, pp.455-477. There are three species of flea-beetles: Ch. concinna, Ch. heptapotamica, and Ch. heikertingeri, and 6 measurements on each. 1 = width of the first joint of the first tarsus in microns (the sum of measurements for both tarsi). 2 = the same for the second joint. 3 = the maximal width of the head between the external edges of the eyes in 0.01 mm. 4 = the maximal width of the aedeagus in the fore-part in microns. 5 = the front angle of the aedeagus ( 1 unit = 7.5 degrees). 6 = the aedeagus width from the side in microns. width of the first joint of the first tarsus in microns (the sum of measurements for both tarsi). width of first joint Concinna Heptapot. Heikert. 191 131 53 150 15 104 1 185 134 50 147 13 105 1 200 137 52 144 14 102 1 173 127 50 144 16 97 1 171 118 49 153 13 106 1 160 118 47 140 15 99 1 188 134 54 151 14 98 1 186 129 51 143 14 110 1 174 131 52 144 14 116 1 163 115 47 142 15 95 1 190 143 52 141 13 99 1 174 131 50 150 15 105 1 201 130 51 148 13 110 1 190 133 53 154 15 106 1 182 130 51 147 14 105 1 184 131 51 137 14 95 1 177 127 49 134 15 105 1 178 126 53 157 14 116 1 210 140 54 149 13 107 1 182 121 51 147 13 111 1 186 136 56 148 14 111 1 158 141 58 145 8 107 2 146 119 51 140 11 111 2 151 130 51 140 11 113 2 122 113 45 131 10 102 2 138 121 53 139 11 106 2 132 115 49 139 10 98 2 131 127 51 136 12 107 2 135 123 50 129 11 107 2 125 119 51 140 10 110 2 130 120 48 137 9 106 2 130 131 51 141 11 108 2 138 127 52 138 9 101 2 130 116 52 143 9 111 2 143 123 54 142 11 95 2 154 135 56 144 10 123 2 147 132 54 138 10 102 2 141 131 51 140 10 106 2 131 116 47 130 9 102 2 144 121 53 137 11 104 2 137 146 53 137 10 113 2 143 119 53 136 9 105 2 135 127 52 140 10 108 2 186 107 49 120 14 84 3 211 122 49 123 16 95 3 201 114 47 130 14 74 3 242 131 54 131 16 90 3 184 108 43 116 16 75 3 211 118 51 122 15 90 3 217 122 49 127 15 73 3 223 127 51 132 16 84 3 208 125 50 125 14 88 3 199 124 46 119 13 78 3 211 129 49 122 13 83 3 218 126 49 120 15 85 3 203 122 49 119 14 73 3 192 116 49 123 15 90 3 195 123 47 125 15 77 3 211 122 48 125 14 73 3 187 123 47 129 14 75 3 192 109 46 130 13 90 3 223 124 53 129 13 82 3 188 114 48 122 12 74 3 216 120 50 129 15 86 3 185 114 46 124 15 92 3 178 119 47 120 13 78 3 187 111 49 119 16 66 3 187 112 49 119 14 55 3 201 130 54 133 13 84 3 187 120 47 121 15 86 3 210 119 50 128 14 68 3 196 114 51 129 14 86 3 195 110 49 124 13 89 3 187 124 49 129 14 88 3