PTECTICUS. , 5 



44. Ptecticus longipennis, Wied. 



Sargus longipennis, Wiedemann, Analec. Entoni. ]). 31 (1824); 



id., Aus8. Zweifl. ii, p. 34 (1830); Macquart, Dipt. Exot. Supp. 5, 



p. 67, pi. i, %. 11 (1855). 

 Ptecticus longipennis, de Meijere, Tijd. v. Ent. liv, p. 205 (1911). 



d . Head with eyes not absolutely contiguous at any point, but 

 nearly so immediate]}' above the bright lemon-yellow, very inflated 

 frontal triangle, which bears a lew yellow hairs ; the shining black 

 irons widening gradually to vertex, which bears a few brown hairs ; 

 face bright yellow ; mouth-opening, proboscis, and neck orange ; 

 antenna) yellowish ; lower part of head with pale hairs. Thorax 

 shining metallic dark blue, or brassy, pubescence pale yellow ; 

 a rather broad orange-yellow callus-like stripe from the yellow 

 shoulder to wing-base ; hind corners of dorsum orange ; prothorax 

 orange, sternopleura shining yellow, rest of sides of thorax aeneous 

 brown or blackish, with short pale hairs ; scutellum metallic blue, 

 hind margin narrowly orange ; mctanotum metallic blue. Abdomen 

 metallic black, 1st segment, reddish yellow at extreme base, 2nd to 

 4th segments with reddish-yellow bands on hind borders, some- 

 times extending over the bases of the next segments. Legs orange- 

 yellow; hind tibiae wholly black, hind tarsi all yellowish. Wings 

 exceptionally long, very pale yellowish ; anterior cross-vein exactly 

 at tip of praefurca ; posterior cross-vein absent, 5th A r ein in puncti- 

 form contact with discal cell ; 2nd and 3rd veinlets from discal 

 cell parallel, 3rd a little foreshortened ; a brown cloud on apical 

 part of wing extending inwards halfway to discal cell ; halteres 

 yellow, clubs brown. 



Length. 12 mm. 



The above description is from a c? (without abdomen) in the 

 Indian Museum from Sadiya, Assam, Bigot's description being 

 also incorporated. Recorded by de Meijere from N.E. Sumatra. 



The 2nd antennal joint has the peculiar shape characteristic of 

 Ptecticus. so the species must be removed here from Sargus, as 

 noted by de Meijere (I. c.). 



45. Ptecticus cyaneus, Brun. 



Ptecticus cyaneus, Bruiietti, Rec. liid. Mus. vii, p. 453 (1912). 



$> . #mtZwith frons almost linear, brilliantly shining violet and 

 blue, with short soft black hairs ; ocelli placed much below the 

 vertex, small, pale yellowish brown, ocellar triangle very slightly 

 elevated; the slight protuberance above the antennae pale whitish 

 yellow ; face blackish, with black hairs, lower part of head reddish 

 brown, prominent ; back of head black, with a fringe of white hairs. 

 Antennae with 1st and 2nd joints black, shining, 3rd joint and 

 the overlapping inner side of the 2nd joint coffee-brown; arista 

 black, apical. Thorax dorsally and scutellum brilliantly shining 

 violet, with rather copious brownish-grey hairs ; thorax below 



