THE CHIRONOMID.E. 189 



D. ol>Sii/i-inianus, Mg. 



Testaceous, shiny. Head black ; thorax with three black stripes. 

 The abdomen is black, the posterior borders of the segments being 

 testaceous. The antennae are black and composed of seven joints, 

 paler at the base ; in the S the plumose antennae have the last joint 

 very long. Wings have the costal, first and second longitudinals, 

 and the pra^brachial transverse veinlet black, the rest white ; the 

 pobrachial areolet closed before the fork of the pobrachial vein. 

 Legs stout and pubescent, reddish-brown, tarsi black, fourth tarsal 

 ■Joint about twice as long as the fifth. Length, 3 lin. 



D. Chiron., Hal. 



Male: " Antennc'e brownish-yellow; first joint dusky cinereous; 

 feathers yellowish ; last joint much longer than the rest jointly. 

 Thorax with the sides ferruginous before the wings (scutellum also, 

 but darker). Wings hyaline, veins very pale ; pobrachial areolet 

 closed a little beyond the fork of the pobrachial vein. Halteres 

 pale yellow. Legs and coxce ferruginous ; only the tips of the tarsi 

 dusky ; fourth joint of the tarsi about twice as long as the fifth ; pos- 

 terior tibiae and femora hairy ; fore tarsi still more so ; first joint a 

 little shorter than the tibia. (Abdomen lost in the only specimen.)" 

 Haliday MSS. Length, 2 lin. 



D. IValtlii, Mg. 



Female : "Blackish, with a slaty-gray tinge on the vertex, mesono- 

 tum and metanotum, and three faint, darker, shifting stripes on 

 the mesonotum. Antennce 7-jointed ; last joint long elliptical, as 

 long as the three preceding. Wings hyaline, with the anterior veins 

 conspicuous, fuscous. The pobrachial areolet closed beyond the 

 fork of the pobrachial vein. Incisures of the abdomen with a paler 

 shade. Legs finely pubescent ; first joint of the fore tarsi shorter 

 than the tibiae ; fourth shorter than the fifth, notched at the tip." 

 Ibid. Length, 2 to 2 J lin. 



D. Aiiujion., Hal. 



"Pale slaty-gray. Fore -legs dusky; femora at the base and 

 cox£E light ferruginous ; posterior femora and posterior tibiae ferru- 

 ginous, except at the tips ; tarsi somewhat lighter brown at the base, 

 fourth joint the shortest, notched almost obcordate. S, front 

 broad. Eyes a little emarginate internally. Antenna nearly as long 

 as thorax, dingy yellow ; feathers light yellowish. Wings white, as is 

 also the very faint pubescence on the hind margin ; the usual veins 



