. Fig. 41. Antenna of S. sulphureus. X 60. Avith apical spurs. Claws small; the pulvilli well developed; the em- podium rudimentary. Wings as in Bombylius, but the medial cross- vein situated near the base of the discal cell, thus the basal cells of equal length. Alula well developed, fringed at the margin. Alar squamula fringed at the margin; frenulum with long hairs. The larva and pupa I have not examined; they are described and figured {S. oreas) by Riley (Sec. Rep. of the U. S. Ent. Comm. for 1878 and 79, 1880, 261, pi. XVI, and Amer. Nat. XV, 1881, 445, pi. VI, fig. 1—3), and those of S.
. Fig. 41. Antenna of S. sulphureus. X 60. Avith apical spurs. Claws small; the pulvilli well developed; the em- podium rudimentary. Wings as in Bombylius, but the medial cross- vein situated near the base of the discal cell, thus the basal cells of equal length. Alula well developed, fringed at the margin. Alar squamula fringed at the margin; frenulum with long hairs. The larva and pupa I have not examined; they are described and figured {S. oreas) by Riley (Sec. Rep. of the U. S. Ent. Comm. for 1878 and 79, 1880, 261, pi. XVI, and Amer. Nat. XV, 1881, 445, pi. VI, fig. 1—3), and those of S. autumnalis and S. (Anastoechus) nitidulus by Portchinsky (Les parasites des criquets nuis. en Russie. St. Petersb. 1894). The larva is wiiitish, cylindrical or somewhat flattened Avith slight swellings along the lateral margins. The body consists of thirteen segments. The head is small, retractile; the mouth parts are quite like those in Bombt/lius, and there are likewise small antennal papillae. The larva is amphipneustic with spiracles on prothorax and on the penultimate segment. The pupa also resembles that of Bombyliiis; it is yellow^ and has two strong spines on the head at the base of the antennal sheaths, and at the end of each sheath two other spines somewhat connected at the base, and finally there is a pair of spines at the base of the proboscis, thus eight spines in all. The armature of the abdomen is similar to that in Bomhylius, but there seem to be no long bristles on the first dorsal abdominal segment. Riley gives mesothoracic and eight pairs of abdominal spiracles, but I think this is erroneous and his figure only shows prothoracic and seven abdominal pairs of spiracles. The larvae live in the egg-cases of locusts; S. oreas was bred from Oedipoda atrox (Riley, 1. c), S. autumnalis and leucophaeus from Stauronotus maroccanus (Stepanof, Verb. Nat. Gess. Gharkow, XIII, 1880 and XV, 1881) and S. (Anastoechus) nitidulus from the same (Ghimkewitch, Horae Ent. Ross.
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Keywords: ., bookauthorlu, bookcentury1900, bookdecade1900, booksubjectdiptera
