186 DIPTEKA. 



Face with a very slight brownish pollen, which is but little visible under the dense 

 hair; facial protuberance prominent, rising abruptly, densely beset with long, com- 

 paratively slender, black hairs; on each side a small inconspicuous tuft of short 

 yellowish-white hair (the only hairs on the whole body that are not black) ; antennae 

 black, the third joint elongate-linear, one and a half times the length of the preceding 

 two joints together ; proboscis straight, ending squarely, as in JDasyllis ; hairs of the 

 beard and upper portion of the occiput dense and soft and with no conspicuous macro- 

 chaetae among them ; a pair of long, soft hairs on the ocellar tubercle. Thorax opaque- 

 black ; an inconspicuous brownish pollen on the pleurae ; the usual macrochaetae not 

 much stronger than ordinary hairs ; the edge of the scutellum beset with a dozen or 

 more long, soft hairs. Halteres dark brown. Abdomen moderately shining ; black, 

 with a purplish reflection, the first segment with a bluish one ; comparatively slender, 

 narrowest at the base, gradually expanding, broadest on segments 4 and 5 ; its back 

 convex, its profile a curve. Legs black, the hind pair metallic bluish or purplish ; hind 

 femora swollen on the distal half only, slender at the base ; hind tibiae nearly straight ; 

 all the hairs soft (no conspicuous stronger bristles) ; pulvilli brown. Wings brown, 

 the middle of the cells being less saturate ; alula remarkably small ; first posterior 

 cell a little coarctate towards the end. 



N.B. — I place this species in the genus La/phria in the wider sense. Its slender, 

 ichneumon-like shape and the absence of all macrochaetae (or rather their assimilation 

 to ordinary hairs) are peculiar. But I prefer not to introduce new divisions so long as 

 the existing ones are insufficiently defined. 



The other Laphrice from our region, described by earlier authors, are : — 



Laphria fascipennis, Macq. Hist. nat. Ins. Dipt. i. p. 284. — Cayenne (Macq.); 



Central America (Loew). Syn. L. prwpotens, Macq. Dipt. Exot. Suppl. 



i. p. 79. 



componens, Walker, Trans. Ent. Soc. Lond. n. ser. v. p. 281. — Mexico. 



triligata, Walker, 1. c. p. 281. — Mexico. 



homopoda, Bellardi, Saggio &c. App. p. 20, f. 16. — Mexico, Tuxpango. 



olbus, Walker, List &c. ii. p. 375; Macq. Dipt. Exot. Suppl. p. 53, t. 2. f. 3. 



— Guatemala, Honduras. (N.B. — This species is not a Lampria.) 

 Pogonosoma arachnoides, Bigot, Ann. Soc. Ent. Fr. 1878, p. 227. — Mexico. 



LAMPRIA. 



Lampria, Macquart, Dipt. Exot. i. 2, p. 60 (1838). 



l. Lampria clavipes. 



Laphria clavipes (Fabr.), Wiedem. Aussereur. zweifl. Ins. i. p. 513 \ 



Lampria clavipes, Macq. Dipt. Exot. i. 2, p. 61 ; Schiner, Eeise d. Novara, Zool. ii. Abth. i. 1, p. 174 a . 



Hob. Panama, Bugaba (Champion). — Brazil 1 2 . 



