PTECTICUS. lO 



4-1. Ptecticus longipennis, Wied. 



>Sarffiis hmtjipennis, Wiedemann, Analec. Entoiii. ]>. ;ll (1824); 



id., Auss. Zweifl. ii, p. ?A (1830); Macquart, Dipt. Exot. Siipp. 5, 



p. 07, pi. i, fig. 11 (1855). 

 Ftedicus longipennis, de Meijere, Tijd. v. Eiit. liv, p. 205 (1911). 



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

 nearly so iuiniediately above the bright lemon-yellow, very inflated 

 frontal triangle, which beai's a tew yellow hairs ; the shining black 

 frons widening gradually to vertex, which bears a few browii hairs ; 

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

 antenna? yellowish ; lower part of head witli pale hairs. Tliorccc 

 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 

 browji or blackish, with short ])ale hairs ; scutellum metallic blue, 

 hind margin narrowly orange ; metanotum 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 tibiie wliolly black, hind tarsi all yellowish. Wings 

 exceptionally long, very pale yelloxA ish ; anterior cross-vein exactly 

 at tip of pnefurca. ; posterior cross-vein absent, 5th vein 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 ; haiteres 

 yellow, clubs brown. 



Lentjth. 12 imn. 



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

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

 also incorporated. Kecorded 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 (?. c). 



45. Ptecticus cyaneus, Bnni. 



Ftedicus ct/cmeus, Bruiietti, Eec. Ind. Mus. vii, p. 453 (1912). 



5 . Flead with 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 antennse pale whitish 

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

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

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

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

 black, apical. TJwrcuv dorsally and scutellum brilliantly shining 

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



