DolichopodiJae. 309 



Gerståcker 1. c, that is to say, it has at the end a long, undivided 

 appendage, but in my specimens I could see no lamellæ above this 

 appendage. probably tiiey are hidden in it; the mentioned appendage 

 seems to answer to ventral lobes, and I could detect no outer lamellæ. 

 Penis is long. Lubben gives (Zool. Jahrbiich. Abtheil. fiir Syst. XXVI, 

 1908, 323) a figure of the hypopygium of T. smaragdinus, but he 

 gives no explanation, and I do not quite understand the figure. In 

 the female the abdomen has five visible segments, and it terminales 

 with a long, somewhat strong, knife-shaped ovipositor, I could observe 

 no dot-like impressions. The abdominal segments have only indistinct 

 hindmarginal bristles. Legs somewhat short, hind metatarsus shorter 

 than the second joint. The legs have short hairs, anterior coxæ bristly 

 hairs, middle coxæ with a stronger bristle near the outer margin; 

 hind coxæ with two bristles on the outer side; middle tibiæ with a 

 strong, hind tibiæ with a small apical bristle or spine, otherwise the 

 tibiæ without bristles. There are two claws, two small pulvilli, and 

 a narrow, somewhat comb-shaped empodium. Wings with the media- 

 stinal vein somewhat indistinct towards the apex. but however termin- 

 ating in the subcostal vein; discai vein without bend, parallel with 

 the cubital vein; the posterior cross-vein placed before the middle; 

 anal vein Avanting, and also the lower postical branch obliterated; 

 axillary lobe well developed; the alular margin without hairs. No 

 convexity on the discai vein. Squamulæ with a distinct angulary 

 lobe, bearing a long fringe, the inner part of the squamulæ short- 

 haired. 



With regard to the developmental stages Lubben has (1. c.) described 

 what he declares to be the larva and pupa of T. smaragdinus. The 

 larva is described as elongated, cylindrical, with a rounded posterior 

 end, 12 mm in length (while the imago is 2,.5— 3,8mm); on the ven- 

 tral side there are eight transverse swellings, armed with chitinous 

 rods with stellately shaped ends, and with curved spines; the mouth 

 parts are described as asymmetricai mandibles, one inserted by arti- 

 culation in the other. The larva is declared to have eight pairs of 

 spiracles along the sides (prothoracic or posterior spiracles are not 

 mentioned). The pupa resembles somewhat other Dolichopodid pupæ; 

 it has on the front part of the head two strong, triangular, quite 

 approximated teeth, which project forwards and are serrated on the 

 outer edge (they are called mandibles in the paper). There are a 

 pair of prothoracic, and four pairs of abdominal spiracles, all pro- 

 longed into long, somewhat curved spiracular tubes, the prothoracic 

 are the shortest. The abdominal segments have girdles of spines 

 above. — The larvæ live in the stalks of Phragmites, in the upper. 



