36 Orthoirhapha brachycera. 



longer, somewhat compressed, with a short one-jointed or very indi- 

 stinctly two-jointed style, at the end with . a bristle-shaped apex. The 

 eyes have the facets in front, at the margin, only very slightly enlarged. 

 Clypeus is distinctly marked off below in the middle of the epistoma. 

 There is a membranous part on the back of the head below the 

 occipital foramen in which Ue the imited stipites of the maxillæ. Pro- 

 boscis short, directed downwards and a little forwards; it is truncate 

 at the apex. The basal part of the labium occupies somewhat more 

 than the half of the whole length ; labrum short, scarcely as long 

 as the basal part of the labium. The maxillæ are slightly curved 

 towards the apex, the maxillary palpi short, cylindrical, one-jointed. 

 Hypopharynx pointed, beset with erect hairs over somewhat more 

 than the apical half. Maxillæ and hypopharynx as long as labium. 

 Thorax rectangular, high and arched above; there are groups of 

 præsutural, supraalar and postalar bristles ; besides, there are two rows 

 of rather distinct dorsocentral bristles which are longest and most distinct 

 on the hinder part. The scutellum has long marginal bristles. The 

 mesopleura have a vertical row of long and strong bristles; hypopleura 

 without bristles or hairs. The metathorax is developed, but small, 

 on the ventral side there is a rather short metasternum, the space 

 between it and the hind coxæ is membranous. The abdomen consists 

 of eight segments, the first dorsal segment is short, the second the 

 longest; on the ventral side the first segment is likewise short, and 

 it is nearly divided into two as it has a transverse membranous part 

 in the middle, so that the two chitinized parts are only connected at 

 the side margins. In the male the eighth segment is a small, quite 

 hidden annulus at the base of the genitalia. The male genitalia 

 are somewhat swoUen, consisting of the upper forceps the arms of 

 which are thick, curved towards each other at the apices and with 

 a tooth on the upper inner margin at some distance from the apex; 

 between the arms lies the dorsal median lamella, it is paired but 

 connected in the middle by a membrane. Below the upper forceps 

 lies the lower forceps, it is shorter than the upper with the arms 

 very thick at the base and here broadly connected ; they are as usual 

 of very complicated shape, with spines inwardly. Quite hidden in 

 the eighth segment there is a ventral piece which is paired, or widened 

 on each side, it answers perhaps to the ventral median lamella. — I 

 must here mention a curious faet which may easily cause a misunder- 

 standing of the male genitalia in this genus; all the dried specimens I 

 have examined (of L. cinctus) had the larger forceps turned down, even 

 though somewhat obliquely, and at first I thought this was the lower 

 forceps; but on examining specimens preserved in alcohol I was struck 



