Morphological Differences between the "Races" of Drosophila Pseudoobscura

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Abstract
The use of statistical analyses of variance, co-variance, and the determination of discriminant functions reveals that there are significant racial differences in the number of teeth in the proximal and distal sex-combs, in the length and width of wings, and in the tibia-length of [male][male] of races A and B. Race A [male][male] have more teeth in sex-combs, larger wings, and longer tibiae. No racial differences in wing-size or tibia-length exist in [female][female]. The racial difference in sex-combs was equally evident in successive expts. and at different temps. Although more accurate classification would be possible with a combined score for these differences, it would be little superior to the approx. 10% misclassification if proximal sex-combs alone were used.