332 Professor Aldricli on the 



in the male. Fore and middle femora yellow, hind ones slightly 

 yellow at base and tip. 



Length 2 mm.; of wing, 1*8 mm. 



Numerous specimens. Sea level to 1000 feet. May. 



ASYNDETUS. 



Loew, Centur., viii., 58^ 1869. 



1. Asyndetus fratellus, n. sp. (PI. XIL, fig. 114, tip of 



wing.) 



^ . Green, thickly dusted, not shining except on femora and 

 slightly on abdomen. Face very broad, the sides parallel, covered 

 with opaque, whitish dust. Palpi rather large, with black hairs 

 and whitish-dusted. Front very broad, like the face in colour but 

 a very little less dusted, showing more of the underlying green. 

 Antennae black, short, the second and third joint together nearly 

 circular in outline. Arista dorsal. Orbital cilia black above, 

 white below. Thorax heavily dusted with brownish, not at all 

 shining, a single scattering row of very minute acrostichal bristles. 

 On each side of the broad, median dorsal stripe is an ill-defined, 

 light-blue dusted stripe, so that the brown colour appears to form 

 three broad longitudinal bands, the lateral ones so wide as to 

 extend down over the pleurse for some distance, the blue colour 

 reaches the corners of the scutellum, and the latter is wholly blue, 

 except a narrow trace of brown along the posterior border. It has 

 two large bristles. Pleurae brownish above, fading into light blue 

 below. Tegulee yellow, their cilia whitish. Halteres yellow. 

 Abdomen moderately elongate, tapering, green, but little shining. 

 Behind each incisure the colour is deep blue and more metallic. 

 The hair of the abdomen is black, and conspicuously coarse and 

 long. Hypopygium small, embedded, with four bristles pointing 

 backward. These are about as long as the fifth segment. Legs 

 robust, black, bristly, the coxae whitish from the overlying dust, 

 front and middle ones with numerous bristles on the front side, the 

 hind one with a single lateral bristle. Femora all somewhat 

 thickened, dark green rather shining, with rows of moderate 

 bristles on the under side. These structures are not raptorial, 

 since they are rather weak and the tibias lack the corresponding 

 development. Knees narrowly yellow. Tibiae fuscous, the front 

 ones a very little lighter, simple," with strong bristles. Tarsi 

 black, simple. Pulvilli of all the feet much elongated, yellow. 

 Wings slightly greyish, fading into hyaline posteriorly and 



