48 Psyche iFtbruary 



Orimarga argenteopleura sp. nov. 



Oark brownish black; pleura; wilh a silvcry-bluc band; legs uniform dark brown. 



cf , Length, 8.8 mra.; wing, C.-t mm.; abdomen, 6.8 mm. 



I'ore leg, femur, 5 mm.; tibia, 5.3 mm.; tarsus, 5.1 mm. 



Hind leg, " 5.4 mm.;" 5.5 mm.; " 4.2 mm. 



9 Length, 6.2 mm.; wing, 4.9 mm. 



cf Head: rostrum and palpi dark brownish-black; antennae, basal segments 

 dark, silvery-greyish poUinose; flagellar segments dark brownish-black. Front 

 very pale blue, the vertex and occiput brown with a sparse bluish bloom; back of 

 the eye, on the vertex, seven or eight very long dark hairs. 



Thorax: mesonotum very dark brown without apparent dorsal stripes; a narrow 

 bright silvery-blue stripe running along the extreme lateral edge of the thorax, 

 beginning on the end of the prothoracic scutellum, continuing to above the wing- 

 basis. Pleurae dark brownish-black with a much broader silvery band extending 

 from above the fore coxa back to above the hind coxa. Ilalteres, stem light brown, 

 knob dark brown. Legs: coxae, trochanters and extreme base of the femora light 

 brown, the remainder of the legs dark brown. Wings: uniformly suffused with 

 dark; veins almost black; extreme apice of the wings, in the ends of the radical cells, 

 still darker brown. Venation: (See fig. f.): Rs angulated at its origin; cross- 

 vein r at the tip of R.; cross-vein r-jn distad of the level of r; basal deflection of Cu. 

 at about one-third the length of Rs. 



.\bdomen very elongated, dark brownish-black. 

 9 .\lmost exactly like the cf , but much smaller. 



Holotype, cf Trece Aguas, Cacao, Alta V Paz, Guatemala, April 24. 

 (Barber and Schwarz, coll.) Allotype, 9 . Type-locality, .\pril 26, (Barber and 

 Schwarz). 



Types in the U. S. National Museum coll. (Cat. No. ) 



Ceratocheilus W^;sch6 



1010. Ceratocheilus We.sclie; J<nirii. Liiin. Soc-. Zool.; vol. 30; 

 p. 358. 



1912. Neoslyringomyia Alexander; Canad. Ent.; vol. 44; p. 

 85. 



The genus Ceratocheilus \va.s erected by the late Mr. We.sclie for 

 a species which he described as new {wirmsampsom), but which 

 Mr. F. W. Edwards has since determined as being conspccific with 

 the Styringomyia cornigera of Speiscr. Neither Mr. Wesche's 

 paper, nor Mr. Edward's extremely valuable article (Annals and 

 Magazine Nat. Hist.; series 8, vol. 8, p. 279-283; Aug. 1911) 

 were available to me until after my paper was issued, wherein I 

 erected the subgenus Neostyringomyia, using exactly the same t\-pe, 

 cornigera Spcis; consequently my name falls as a rank synonym of 



