PSOROPHORA TERMINALIS 553 



Original Description of Janthinosoma posticata Theobald, not Culex posticatus 

 Wiedemann: 



Thorax brown, rather testaceous behind, with flat, spindle-shaped, bronzy and 

 yellow scales. Abdomen steel-black with metallic violet scales, with basal triangular 

 patches of creamy scales; venter yellow scaled. Legs dark brown with metallic 

 steely and purple reflections, the last hind tarsal joint dull white, legs densely scaly. 

 Wings with a brownish tinge. 



$. Head steely-black, with dense, golden, forked upright scales behind, a few flat 

 rather broad, creamy ones in front and a few purplish and then creamy ones at the 

 sides; eyes pale steel colour and black; bristles in front of the head black, two golden 

 ones between the eyes; antennae brown with the basal joint on the outside bright 

 testaceous, dark on the inside, second joint also testaceous, but darker; palpi tes- 

 taceous, covered with steely-black scales, the testaceous colour shows through at 

 their base; proboscis metallic purple in some lights with creamy scales just at the 

 base, brown in others. 



Thorax shiny, purplish-brown in front, testaceous behind, with scattered, flat, 

 spindle-shaped, bronzy black and yellow scales, the dark ones predominating, with 

 three rows of black bristles, the median one ending before the bare patch in front 

 of the scutellum; scutellum darker in the middle than at the sides, with flat, bronzy 

 scales and black bristles; metanotum pale chestnut-brown; pleurae pale ochraceous- 

 brown with numerous white scales. Abdomen when denuded steel-blue, covered with 

 bright metallic purple scales, the flrst segment ochraceous with two patches of deep 

 purple scales and golden bristles; posterior borders with golden hairs; laterally 

 are triangular basal patches of creamy scales on each segment; venter nearly 

 covered with yellow scales. 



Legs covered with dark brownish-black scales, with metallic steely and purplish 

 reflections, knee spots white, bases and venter of femora yellowish, last tarsal joint 

 of the hind legs dull white. 



Wings with a slight brownish tinge, scales brown, lateral ones moderately long 

 and narrow; first sub-marginal cell very little longer and narrower than the second 

 posterior cell, its stem equal to nearly half the length of the cell; stem of the second 

 posterior cell nearly the same length and about as long as the cell; posterior cross- 

 vein distant a little more than half its own length from the mid cross-vein. 



Halteres with pale stem and fuscous knob. 



Length. 5 mm. 



Habitat. Castries, St. Lucia (St. George Gray) (19. 7. 99); Argentina (Arribal- 

 zaga). 



Time of capture. August in St. Lucia. 



Observations. Described from a single female sent by Dr. St. George Gray, with 

 note that it was taken at 7 p. m. in the Botanic Gardens, Castries. 



It is evidently Wiedemann's Culex posticatus described from Mexico, and may be 

 told from the allied C musicus, Say, by the last tarsal joint only being white. 



I cannot see the ungues properly in the single specimen sent, but one on each 

 foot is in any case toothed; they are probably both equal and serrated. 



Original Description of Janthinosoma tebminalis : 



The type [of Culex posticatusl has the last two joints of the hind feet wholly 

 white; Janthinosoma musica Say is a synonym. The Janthinosoma posticata of 

 Theobald, in which the last joint of the hind feet is white, is therefore a different 

 species, for which the writer proposes the name terminalis. 



Unrecognized species [of Janthinosoma: J.] terminalis Coquillett {posticata Theo- 

 bald, not of Wiedemann), was described from St. Lucia, W. Ind., and differs from all 

 of the other species in that the last joint only of the hind feet is white. 



We possess no specimens of this species. The larva is unknown. 



Nothing is Icnown of the life history and habits. 



St. Lucia, West Indies and Argentine (Theobald) . 



Mr. Theobald described a single specimen from the island of Santa Lucia 

 under the name Janthinosoma posticata Wiedemann ; Mr. Coquillett recognized 

 from the description that it was wrongly identified, and proposed a new name 

 for it. No specimens of this form are before us, but Mr. Busck has examined 

 the specimens in the British Museum, and reports that there are five specimens 

 from St. Lucia (Gray) ; the last hind tarsal Joint only is white, but not equally 

 distinctly white in all the specimens. We have noted above that specimens of 

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