232 'BRITISH GUIANA TIPULIDAE 



Atarba varicornis Alexander 



1913. Alarba varic.rnis Alexander, Ent. News, xxiv, 448, pi. xiv, fig. 10. 



One male from Mallali, March 25, 1913. 



This is the first male to be made known and I make it the allo- 

 type. The antennae in this sex are nearly as long as the rest of the 

 body, the basal three-fifths of each segment blackish brown, the 

 apical portions yellowish; the segments with long outspreading 



hairs. 



Genus CERATOCHEILUS Wesche 

 1910. Ceratocheilus Wesche, Jour. Linn. Soc, Zool., xxx, 358. 



Geratocheilus americanum Alexander 



1913. Ceratocheilus americanum Alexander, Psyche, xx, 49, 50, pi. 2, figs. 

 e and j. 

 One typical dark female, Bartica, February 12, 1913. 



Genus TOXORHINA Loew 

 1851. Toxorhina Loew, Linnaea Entom., x, 400 to 402. 



Toxorhina centralis Alexander 



1913. Toxorhina cen'ralis Alexander, Psyche, xx, 52, 53, pi. 2, fig. i. 



Three specimens from Bartica, December 10, 1912, a 9 , to Feb- 

 ruary 28, 1913, a cf^. 



A specimen of another species is represented by a single female 

 from Bartica, December 12, 1912. It is allied to hrasiliensis 

 Westwood in the dark tibial apices, but it is very much smaller. 

 I prefer to leave this form until more material becomes available. 



Genus TEUCHOLABIS Osten Sacken 

 1859. Teucholabis Osten Sacken, Proc. Acad. Nat. Sci. Phila. , 1859, p. 223. 



Teucholabis annulata Williston 



1896. Teucholabis annulata Williston, Trans. Ent. Soc. Lond., 1896, 290, 

 pi. 10, f. 63. 

 One male from Bartica, November 30, 1912; females from Barti- 

 ca, November 30, 1912 and January 14, 1913. 



Teucholabis trifasciata Enderlein 



1912. Teucholabis trifasciata Enderlein, Zool. Jahrb., xxxii, pt. 1,69, fig. 

 Rl. 

 One specimen, sex undeterminable because the abdomen is 

 broken, from Bartica, December 4, 1912. 



