126 Orthorrhapha brachycera. 



as in Bombylius, notopleural, postalar and scutellar marginal bristles 

 present, the first generally hidden in the pile; metapleura with a 

 vertical tuft of hairs. Male and feniale genitalia quite similar to those 

 in Bombylius. Legs with bristles on the ventral side of the posterior 

 femora and on the tibiæ, on the front tibiæ they are small; all tibiæ 



Fig. 41. Antenna of S. sulphureus. X 60. 



with apical spurs. Glaws small; the pulvilli well developed; the em- 

 podium rudimentary. Wings as in Bombylius, but the medial cross- 

 vein situated near the base of the discai cell, thus the basal cells of 

 equal length. Alula well developed, fringed at the margin. Alar 

 squamula fringed at the margin; l'renulum 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 whitish, cylindrical or somewhat 

 flattened with 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 Bombylius, and there are likevvise 

 small antennal papillæ. The larva is amphipneustic with spiracles 

 on prothorax and on the penultimate segment. The pupa also 

 resembles that of Bombylius-, 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 fmally 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 Bombylius, 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 larvæ live in the egg-cases of locusts; S. oreas was bred 

 from Oedipoda atrox (Riley, 1. c), S. autumnalis and leucophaetis from 

 Stauronotus maroccanus (Stépanof, Verli. Nat. Gess. Charkow, XIII, 

 1880 and XV, 1881) and S. (Anastoechus) nitidulus from the same 

 (Ghimkewitch, Horæ Ent. Ross. XVIII, 1883), fmally Portchinsky (1. c.) 



