new genera and species of Acroceridcc. 513 



Long. Corp. lin. 2| ; expans. alar. lin. 5. 



Habitat in Valdivia. In Mus. Hopeiano Oxonise. 



In the s]3ecimens of this species which I have seen and 

 which I believe are males, the proboscis is terminated by 

 two long, divergent, curved, slender lobes, as in the genus 

 Sf/strojnis. 



Genus Pterodontia, Gray in Griffith, An. K., 

 Macquart, Erichson. 



This curious genus, although possessing but few species 

 of great rarity, has a very wide geographical range. 



1. Pterodontia flavijies, Gray, op. cit. part 34, p. 779 

 (Insects), p]. 128, %, 3. Ilab. (jeorgia in North America 

 (incorrectly confounded by Macquart and Erichson with 

 another species from Australia). The type is in the 

 British Museum. 



2. Pt. Macquartii, Westw. Trans. Ent. Soc. vol. v. 

 p. 97. 



Pt. flavipes, Macquart, Dipt. Exot. 1, 2, 175; Erich- 

 son, Ent. p. 164. An Pt. Mellii, var.? Hab. Nov. Holl. 



3. Pt. JVaxelii, King, Erlchs. Hab. the Black Sea. 



4. Pt. Mellii, Erichs. Entom. p. 163. Hab. Liverpool 

 Plains, New Holland. 



5. Pt. FzV/^onfZeV, Erichs. Entom, p. 163. Hab. Brazil. 



6. Pt. analis, Westw., op. cit. p. 97. Hab. Georgia. 

 In Mus. Britann. 



Sp. 7. Pterodontia dimidiata, n. sp. 

 (PI. VI. fig. 1 and details.) 



Nigra, nitida; nigro-hirta, abdomine segmentis 3tio ad 

 apicem aurantio-rufis (3tio macula, dorsali media nigra 

 ornato); pedihus flavidis, femoribus duobus anticis fuscis, 

 quatuor posticis nigris; alis dimidio basali fusco, apicali 

 hyalino; stigmate crasso, cum spina costali fulva; alulis 

 fumosis ; ventre piceo. 



Long. corp. lin. 4 ; expans. alar. lin. 8. 



Habitat in Columbia. In Mus. Hopeiano Oxonite. 



Genus PiALEA, Erichson, Entom. p. 160. 



Pialea'^ lutescens. (PI. VI. fig. 2 and details.) 



Tota lutescens, parum pubescens ; thoracis dorso magis 

 fulvo, vittis duabus lateralibus nigris ; alis luteo-hyalinis, 

 venis luteis ; antennis dcflexis, articulo ultimo compresso. 



