164 UBAMUS AND PSALOBRENTHUS. 



Since the publication of my descriptions Dr. Senna has 

 written to me telling me that he is of opinion that the 

 insect I described and figured in the work mentioned, 

 under the name of Psalobrenthus solitarius from a single 

 individual found in Costa Rica, is the same as his Uba- 

 nius ceneus cf, and has kindly sent me his specimen to 

 enable me to compare the two. 



I have now before me all the specimens known to exist 

 of the two supposed genera and species (except the Chiriqui 

 female , and that I have also seen previously) and am able 

 to say that Dr. Senna's opinion as to the identity of Uba- 

 nius ceneus cf and Psalobrenthus solitarius ^f is correct. I have 

 also no doubt that Ubanius emeus cT and 9 of Senna are 

 different species. Whether they are different genera cannot 

 at present be decided, owing to the insufficient material 

 not enabling us to compare the sexes of each. We know, 

 in fact , only the male of one and the female of the other, 

 and the genera of Brenthidse are established almost enti- 

 rely on the characters of the male. 



It thus becomes necessary to decide whether the name 

 Ubanius mneus shall apply to the insect of which we know 

 the male only, or to that of which we know the female 

 only : and I think the application of the name to the male 

 is in this case clearly the correct course. 



Under these circumstances the insect described by me as 

 Ubanius ceneus is without a name, and I now therefore 

 propose to call it U. patens. The type in the collection of 

 Messrs. Godman and Salvin agrees exactly with that in 

 the Rothschild Museum , and with the one in Dr. Senna's 

 collection. 



Another female from Belize , British Honduras , from 

 the Rothschild Museum , also communicated to me by Dr. 

 Senna is only about half the size and is somewhat diffe- 

 rently sculptured so that it may be either a variety of 

 U. potens or a closely allied species. 

 The synonymy will be as follows: 



Notes from the Leyden ]VIu.seu.ra, A''ol. XVII. 



