TEUCHOLABIS. 7 



the tips of tibiae and the tarsi, infuscated. Wings hyaline, the veins brown ; stigma 

 small, brown. Venation like Monogr. &c. iv. tab. 1. f. 12 ; only the praefurca a little 

 more arcuate ; the remainder of the second vein more straight, the marginal cross- vein 

 in a line with the other central cross-veins. 



Four males in Prof. Bellardi's collection. 



The specimens are not in good condition, and for this reason the description is not so 

 complete as it should be, especially as regards the head, abdomen, and pleurae. 



N.B. — Limnobiamorionella, Schiner, Eeise d. Novara, Zool. iii. Abth. i. p. 47 (South 

 America), is a Teucholabis ; it may perhaps be the same species as T. molesta. 



2. Teucholabis gracilis, sp. n., s . 



Slender, the rostrum prolonged ; thorax yellowish-red, with three confluent black stripes ; scutellum, metanotum, 

 and abdomen black, with a strong metallic violet-blue reflection ; abdominal incisures reddish-yellow ; wings 

 hyaline. 



Length 9-10 millim. 



Hab. Mexico, Orizaba (Sumichrast). 



Antennae and palpi brown ; rostrum and front black with a violet reflection ; posterior 

 and inferior part of the head reddish (the heads of both specimens are injured). Thorax 

 reddish-yellow ; three confluent black stripes occupy nearly the whole mesonotum, the 

 intermediate one extends over the collar, the lateral ones reach posteriorly beyond 

 the thoracic suture, towards the scutellum, leaving a reddish interval between them ; 

 metanotum and scutellum metallic black, with a violet reflection ; halteres brown. 

 Abdomen metallic black, with violet reflections ; incisures of the segments reddish- 

 yellow ; the same reddish colour appears on the ventral side, near the base of the 

 abdomen, and also on the segments preceding the male forceps, the latter black and 

 hairy. Legs brown ; coxae and base of the femora reddish-yellow. Wings hyaline, 

 rather narrow, with very dark veins ; stigma small, brown, not longer than broad, 

 bisected by the marginal cross-vein ; central cross-veins and origin of second vein 

 slightly clouded with brown. The venation differs somewhat from that of T. complexa 

 figured by me in Monogr. &c. iv. tab. 1. f. 12 ; the proximal ends of the submarginal and 

 discal cells are on the same line, but the small cross-vein between them is a little nearer 

 the apex, so that the first posterior cell is shorter ; the great cross-vein is removed from 

 the discal cell to a distance equal to its own length. 



Two males in Prof. Bellardi's collection in Turin. 



This is the form of Teucholabis alluded to by me in Monogr. &c. iv. p. 132, line 6 

 from top. — The species may perhaps be the same as T. {Rhamphidia) chalybeiventris, 

 Loew, Wien. entom. Monatschr. 1861, p. 33 (Cuba) ; but the thorax of the latter is 

 described simply as " melleus, sub-badius," while T. gracilis has the scutellum and meta- 

 notum black ; the abdomen also is much darker. 



