. Fig. 16.—Systcechus, Lw., wing. Life-history. The early stages of S. autumnalis and S. oreas, a Europeau and North American species respectively, have been observed by Portchinsky and by Biley. The larvae live in the egg-cases of locusts ; they are whitish, cylindrical, amphipneustic, and 13-segmented, much as in Bombylius. The pupae also resemble those of that genus. Table of Species. 1. Legs with at least femora black ; abdomi- nal spines black 2. Legs wholly or principally yellow 3. 2. Pubescence pale to bright yellow socius, Walk., p. 276. Pubescence nearly white nivalis, Brum, p. 277. 3
. Fig. 16.—Systcechus, Lw., wing. Life-history. The early stages of S. autumnalis and S. oreas, a Europeau and North American species respectively, have been observed by Portchinsky and by Biley. The larvae live in the egg-cases of locusts ; they are whitish, cylindrical, amphipneustic, and 13-segmented, much as in Bombylius. The pupae also resemble those of that genus. Table of Species. 1. Legs with at least femora black ; abdomi- nal spines black 2. Legs wholly or principally yellow 3. 2. Pubescence pale to bright yellow socius, Walk., p. 276. Pubescence nearly white nivalis, Brum, p. 277. 3. First and 2nd antennal joints brownish yellow; femora and tibise wholly bright brownish yellow; abdominal spines [p. 277. yellow Jlavospinosus, sp. n.; Antenna; all black; femora brownish. .. eupogonatus, Big., p. 278. * This is so in many species ; I cannot vouch personally for the constancy of the cbai-acter. x2
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1920
