. Carnegie Institution of Washington publication. . 52 EVOLUTION IN COLOR-PATTERN OF THE LADY-BEETLES. Var. A Mulsant. The sublateral spot of pronotum confluent with the central pattern (see fig. 37). In a lot of 111 from Stony Lake, Michigan, 80 per cent were of this variety, 10 per cent with a sublateral spot separate, and 10 per cent transitional. Var. B Mulsant. Several of the black spots absent. One from Garland, Colorado. Var. E Mulsant. The mark £ prolonged to level of spot 3. Rare. Subspecies of Oregon to California: Specimens from this region show spot 3 + |, spot 2 absent, and 4 smal
. Carnegie Institution of Washington publication. . 52 EVOLUTION IN COLOR-PATTERN OF THE LADY-BEETLES. Var. A Mulsant. The sublateral spot of pronotum confluent with the central pattern (see fig. 37). In a lot of 111 from Stony Lake, Michigan, 80 per cent were of this variety, 10 per cent with a sublateral spot separate, and 10 per cent transitional. Var. B Mulsant. Several of the black spots absent. One from Garland, Colorado. Var. E Mulsant. The mark £ prolonged to level of spot 3. Rare. Subspecies of Oregon to California: Specimens from this region show spot 3 + |, spot 2 absent, and 4 small. The pronotal pattern has an ad- ditional lateral process cephalad of the usual one. 3053. Hippodamia americana Crotch. Distribution: Lake Superior and Hudson Bay. The type specimen in the Leconte collection makes it clear that this abused name belongs to a species closely allied to H. tredecimpunctata rather than to specimens of a variety of H. spuria. It is essentially a black-sutured, usually vittate derivative of H. tredecim- punctata (fig. 39). The specific rank must be retained for the present because of the lack of a large series. The great variation in the few specimens known makes it possi- ble that larger numbers from Lake Supe- , . „ T7. FIG. 39.—Variation in pronotal pattern in riOr might redUCe it tO a Variety Ot tl. ire- H. americana. a, from Hudson Hay: . m1 , d, from Lake Superior. decimpunctata. The pronotum has the pig- ment so extended that it generally conceals the characteristic lateral pro- jection of H. tredecimpunctata. 3051. Hippodamia parenthesis Say. Distribution: United States, except the southeastern States. Fitch has named a long series of forms, some of which are scarcely worthy of recognition (see fig. 40). Being based on one character, two or more of these forms are often embodied in one specimen. There is more intergradation in this species than in the others of Hippodamia. Form tridentifrons Fitch. Three white spots on head confluent. C
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