8 Orthorrhapha brachycera. 



with a narrow part in front on the apex of which is placed the last 

 joint; this is at the end suddenly narrowed in a styliform way^ The 

 eyes have larger facets just in front at the inner margfin from the 

 insertion of the antennæ downwards. The clypeus is indicated 

 in the middle on the lower part of the epistoma. Proboscis is 

 shorter than the head is high; it is straight, directed downwards 

 and somewhat forwards; the basal and the apical part of the 

 labium are of equal length; labrum is short, triangular, of the same 

 length as the basal part of labium ; the maxillæ have the united 

 stipites lying on the posterior side of the head in a membranous part 

 below the occipital foramen; the lacinia is pointed, slightly curved 

 towards the apex; the maxillary paipi are short, slightly club-shaped, 

 one-jointed; hypopharynx is long-pointed, rather thinly beset with 

 erect hairs above over somewhat less than the apical half ; maxillæ and 

 hypopharynx are of equal length and as long as labium. Thorax is 

 rectangular, very high and somewhat arched above; scutellum is small 

 and directed obliquely downwards. There is one præsutural and ene 

 intraalar bristle, both strong; scutellum is without bristles, and on the 

 metapleura no long hairs. Metathorax is rather distinct, the pleural 

 parts bend down and unite on the ventral side behind the hind coxæ; 

 the metasternum on the other hånd is a small plate lying at the hinder 

 end of the metathorax. The space on the ventral side between the 

 downbent pleural parts and the metasternum is membranous. Abdo- 

 men is long and slender, consisting of eight segments; the features of 

 the anterior segments are somewhat curious (Fig. 1); the first dorsal 

 segment is very small, then folio ws a long second segment which has 

 a transverse row of punctiform muscular impressions a little before 

 the middle; the following segments decrease evenly in length and 

 have the transverse row of muscular impressions lying near the front 

 margin; on the ventral side the structure is dififerent, the first ventral 

 plate is only somewhat shorter than the second, thus it stretches 

 some way in under the second dorsal segment, and the connection 



The antennæ in Leptogaster are generally ascribed a two-jointed style, but as 

 shown by figs. 3 and o this is erroneous. Meigen who founded the genus 

 in Ulig. Mag. II, 1803 says in this place about the antennæ only: „dreigliederig 



das letzte kegelformig, spitzig". In Klass. d. europ. Zweifl. 1804 he says: 



„dreigliedrig das dritte ist kegelformig, zusammengedriikt, an der Spizze 



mit einer Endborste." In Syst. Beschr. europ. zweifl. Ins. II, 1820 he says: 

 ,das dritte Glied .... an der Spizze mit einem zweigliederigen Griffel: das 

 erste Glied sehr kurz, das zweite walzenformig, haarig, spizzig, and his flgure 

 (Tab. 21, 11) also shows such a style; but this is a mistake, the style is undi- 

 vided and has no second joint, neither at the base nor at the apex. 



