ALDRICH : DOLICHOPODID.E OF GRENADA, W. I. 93 



ACHALCUS. 



Loew, Neue Beitr., V, 30, 1857. 



Achalcus sordidus. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 339. 



Six specimens. 



Achalcus caudatus, n. sp. 



Male : Face but little narrowed, blackish ; palpi and an- 

 tenntie small, dark brown, the latter with small, rather pointed 

 third joint, the arista almost completely apical, finely pubes- 

 cent ; hairs of the orbit few, seeming to be paler below. Front 

 and thorax black, overlaid with brown dust, which becomes 

 somewhat bluish gray on the pleurae. Abdomen rather dull 

 black. Cilia of tegulte yellowish ; halteres yellowish, with 

 brown knob. Hypopygium rather disengaged, brown, rounded, 

 in some specimens showing parts of the slender yellow organs 

 inside. Coxae and all the legs and feet sordid yellow ; the fore 

 coxae and femorae specially rather dark. Hind metatarsi dis- 

 tinctly shortened. Wings uniform grayish, somewhat slender, 

 fourth vein ending scarcely past the apex ; first vein reaching 

 one-fourth the length of the wing ; sixth vein represented only 

 by a slight fold. 



Female : Except for the absence of the hypopygium, and a 

 slightly stouter form, the same as the male. 



Length, 1 to 1.1 mm. Fifteen specimens, both sexes; one 

 labeled "Windsor estate (Windward), 500 feet, March 28. 

 Cocoa orchard, on foliage." 



PSILOPUS. 



Meigen, Syst. Beschr., VI, 1824. 



Loew, Monogr. N. A. Dolichopodidse, 229, 1864. 



Aldrich, Kans. Univ. Quart., II, 47, 1893. 



Psilopus bellulus. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 343, 



Twelve specimens, both sexes. 



Psilopus chrysoprasius. 

 Walker, List, etc., Ill, 6-i6. 

 Loew, Neue Beitr., VIII, 90: Monogr., II, 266. 

 Aldrich, Trans. Lond. Entom. Soc, 1896, 343. 



Numerous specimens, both sexes. 



