Species of Rhaphium. — Machesrium. 351 



segraento anali rufo-castaneo : Coxae et pedes luteo-pallidi, tarsis apice 

 fuscis : Alae dilute cinereae nervuris fuscis. 



^Under the shady banks of rivulets in Holy wood, also in the county 

 Galway, October.] 



Obs. This genus seems to come near Macropeza (which I suppose to 

 have also naked antennae in both sexes); and again to have some relations 

 with Ceratopogon. 



Fam. DoLiCHOPiD^.* 



RHAPHIUM. Meig. IV, 32, CXXIV. 



1. macrocerum. Meig. IV, 29. 3. 



^ Both sexes near Holywood in Downshire.] 



2. caliginosum. Meig. IV, 29. 4.? 



51 The male ibid.] 



MACH^RIUM. 

 Antenna porrectcE articulo ^tio subtus exciso supra apice valde elongato 

 lineari, stylo terminali breviore biarticulato 

 Ocidi disjuncti. 

 Ala parallelcB incumbentes. 



Frons lata, feminae latior. Antennae basi approximatae, apice divaricatae, 

 capite longiores ; stylo terminali brevi, articulo I"° minuto ovato, 2^° 

 setaceo. Os crassura prominens : Haustellum carnosura labro membranaceo 

 lanceolate utrinque setula sufFulto : Mandibulae sub labro extricatae 

 eoque breviores cultratae disjunctae : Maxillae lobo lato trigone acuminate 

 mandibulis breviore haustelli basin utrinque araplectuntur : Lingua cornea 

 rigida subuUformis: Labella pinguia discreta. (Tab. XV, fig. 11, 12.) 

 Truncus subcylindricus. Alae parallelae incumbentes nervura 4t^ longitu- 

 dinali simplici. Pedes mediecrescoxishaud insignitere lengatis. Abdomen 

 sub-cylindricum mediocre apice conicura, maris gracilius subtus oblique 



* I have noticed every species in my cabinet, for the purposes of a local list 

 and to introduce some generic subdivisions. 



