1913] Alexander — New Neotropical Antochini 49 



Ceratocheihts. All of the species hitherto described are African. 

 C. cornigerum Speiser has spotted wings but C. gilesi Edwards has 

 hyaline wings like the New World form. 



The discovery of this genus in America is very interesting and 

 we may likewise expect Styringomyia to turn up in the Neotropical 

 fauna, when further collections are made. 



Ceratocheilus americanum sp. nov. 



Wings unspotted; thorax with dorsal stripes. 



9 . Length, 10.5 nam. (excluding rostrum); wing, 5.3-6.2 mm.; rostrum, 5.6 

 mm. 



Fore leg, femur, 5.5 mm.; tibia, 5.7 mm.; tarsus, 5.2 mm. 



Middle leg, " 5.4 mm.; " 6 mm.; 4.8 mm. 



Hind leg, " 5.8 mm.; ' 6 mm.; " 4.5 mm. 



The measurements of the legs and body appertain to the 9 with the largest wing 

 (6.2 mm.), the paratype. 



Head: rostrum and palpi dark brown; antennae dark brown; front brown; ver- 

 tex and occiput brown, with a greyish bloom behind; genae grey. Eyes brilliant 

 metallic green. The corniculus represented by a rounded plate above the base of 

 the antenna?. 



Thorax: collare very dark brown; prothorax concealed from above by the over- 

 projecting mesonotum, only the lateral ends of the scutellum, which shows above 

 the humeri as a rather square brown knob on either side. Mesothorax, praescuturn 

 very light buff-colored with dark brown longitudinal stripes; the middle one is 

 broad, begins at the cephalic margin of the sclerite and continues back almost to 

 the suture; on its caudal portion it is indistinctly divided by a pale median vitta; 

 lateral stripes begin behind the pseudosutural foveae, continue back to the scutum 

 where they cover the lobes; extreme lateral edge of the prsescutum buff-colored; 

 scutum dark brown except the pale median depression; scutellum pale greyish- 

 buff; post-notum thinly greyish with indistinct brown stripes on the sides. Pleurae 

 greyish with brown patches on the sides of the sternum; on the mesopleurae, just 

 before the wing basis and another just behind the fore coxa; sternum buffy-grey. 

 Halteres, stem light-colored, knob dark brown. Legs: coxae and trochanters yel- 

 lowish-brown; femora light brown; tibiae and tarsi darker brown. Wings: sub- 

 hyaline, unspotted; veins dark brown. Venation: (See fig. e.); Sc ending just 

 beyond the origin of Its; Its oblique, about as long as R2+3; Ri beyond Its about 

 as long as the deflection of R 4+5. Basal deflection of Cui before the fork of M. 



Abdomen: tergum, sclerites dark brown, from the third outward with the basal- 

 fourth light yellowish; valves of the ovipositor long and slender (See fig. j.). Ster- 

 nites dull yellow, the extreme tip of segments one to four brown; a narrow, 

 indistinct, linear, brown, median stripe. 



Holotype: 9. Culebra, Panama, Central America. Feb. 16, 1902. (W. M. 

 Black, coll.) Paratype, 9 , Igarape-assu, Para, Brazil. Jan. 30, 1912 (H. S. Par- 

 ish, coll.) 



