280 Mr. F. W. Edwards on the so-called 



the genus CeratocheiliiS to what is found in Toxorrhina. No 

 further notice was taken of this resemblance at the time, 

 and no comparisons were made with the descriptions of 

 Toxnrrhwa. Early in the present year, however, tlie writer 

 had occasion to examine carefully Dr. Speiser's description 

 of Styrinyomyia cornigera (Berlin, ent. Zeit. lii. 1907, 

 p. 130), and a suspicion at once arose that this species was 

 related to Ceratocheilus. This suspicion was confirmed by a 

 re-readiug of Wesche^s paper, whUe an examination of the 

 types in the British Museum showed that a considerable 

 amount of confusion of names had arisen, which required 

 clearing up. 



The first thing that was evident from this examination 

 was that the type specimens of Ceratocheilus icinnsampsoni 

 agreed so closely with the description of Stijringomyia 

 cornigera as to leave no room for doubting that the two 

 names applied to one and the same species. The name 

 Styringomyia is evidently wrongly applied to coryiigera, for 

 Loew in his original description of the genus (Dipt. Beit, i. 

 p. 6) says " proboscis brevis,'^ while the figures of the wing 

 given by Loew and Osten-Sacken show a considerable 

 divergence from the neuration of S. cornigera, though it is 

 true there is a certain general resemblance. Fortunately 

 the writer has seen a large number of recent examples of 

 the last-named genus, and there is clearly no close relation 

 between it and Ceratocheilus. 



An examination was next made of the types of Neocerato- 

 cheilus, and it was found that in neuration and in the 

 structure of the head, antennae, thorax, legs, and abdomen 

 there was nothing to separate this genus from Tod'orrhina. 

 The only noticeable difference is that in N. (jrahami the 

 great cross-vein is placed before the base of the discal cell. 

 This character cannot be regarded as generic, and is exhibited 

 also by T. cisatlantica, Speiser. Neoceratocheilus grahami is 

 evidently closely allied to T. cisatlantica, bat differs in the 

 dark halteres, those of the latter species being described as 

 white. Wesche, in his description of Neoceratocheilus, 

 omits to mention that the antenate are twelve-jointed in 

 both sexes (as in Toxorrhina), and he incorrectly states 

 til at the head has '' a fiat plate inserted at the dorsal base of 

 the proboscis.""^ This latter feature is peculiar to the genus 

 CeratucJieilus ; it is not found in the related genera Toxor- 

 rhina and Elephantotni/ia, nor in the genus Styringomyia ; 

 it is, in fact, one of the most important diagnostic characters 

 of Ceratocheilus. This very remarkable structure has been 

 well described by Speiser, who speaks of it as a corniculus; 



