. Bulletin. Natural history; Natural history. 182 Illinois Natural History Survey Bulletin Vol. 33, Art. 3. Fig. 3. - Suggested plant evolution of cucurbitacins B, E, D, I, F, G, and L. Numbers refer to specific enzymes involved: 1) cucurbitacin A' dehydrogenase, 2) cucurbitacin acetylesterase. 3) cucurbitacin A^' reductase, 4) cucurbitacin CS-hydroxylase, and 51 cucurbitacin C24-hydi-oxylase (Lavie & Glotter 1971). Phaedon cochleariae (Fabricius), P cru- ciferae (Goeze), and Cerotoma trifurcata (Forester), are strongly deterred from feeding by the presence of Cues (Niel- son et al. 1977;
. Bulletin. Natural history; Natural history. 182 Illinois Natural History Survey Bulletin Vol. 33, Art. 3. Fig. 3. - Suggested plant evolution of cucurbitacins B, E, D, I, F, G, and L. Numbers refer to specific enzymes involved: 1) cucurbitacin A' dehydrogenase, 2) cucurbitacin acetylesterase. 3) cucurbitacin A^' reductase, 4) cucurbitacin CS-hydroxylase, and 51 cucurbitacin C24-hydi-oxylase (Lavie & Glotter 1971). Phaedon cochleariae (Fabricius), P cru- ciferae (Goeze), and Cerotoma trifurcata (Forester), are strongly deterred from feeding by the presence of Cues (Niel- son et al. 1977; Metcalf et al. 1980). In contrast, the most important in- sect pests of Cucurbitaceae worldwide are found in a large group of beetles of the tribe Luperini, comprising 1,528 species of Old-World Aulacophorina (535 species) and the New-World Dia- broticina (993 species) (Wilcox 1972). Luperini contains such destructive pests of cultivated crops as Diabrotica undecimpunctata howardi Barber, the spotted cucumber beetle or southern corn rootworm; D. undecimpunctata undecimpunctata Mannerheim, the western spotted cucumber beetle; D. balteata LeConte, the belted or banded cucumber beetle; Acalymma vittatum (Fabricius) and A. trivittatum (Man- nerheim), the striped cucumber bee- tles; D. barberi (Smith and Lawrence), the northern corn rootworm; D. vir- gifera virgifera LeConte, the western corn rootworm; D. virgifera zea Kryson and Smith; D. speciosa Germar of South America; Aulacophora foveicollis of Asia, Africa, and Europe; and A. femoralis of Siberia, China, and South- east Asia. The larvae of these beetles are rootworms, and the adults are found feeding on cucurbits, corn, beans, peppers, and a variety of other plants. Host plant records are sorely lack- ing, and Wilcox (1972) in the authori- tative Coleopterorum Catalogus lists only 29 for 1,528 species of Luperini; 72 percent of the recoi'ds are for Cucur- bitaceae. A literature search has dis- closed 49 species, listed in Tkbl
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