COLEOPTERA 



405 



(5) Aptei-ocycliis Iionohilueiisis Waterhouse. 



A. honohduensis % Waterhouse, Tr. ent. Soc. London, 1871, p. 31=;, fig. p. 316. 



There being two species mixed under the name of A. honohilnensis (see deceptor). 

 Mr Waterhouse has selected the supposed female as the type of the species, it being 

 the individual he figured. It is however a male specimen. The following diagnosis 

 may help to its determination should it be ever again met with. 



Niger, opacus, subdepressus, elytris rotundatis ; epistomate recte truncato, sat 

 elongato ; capite latissimo, cantho oculari sat prominulo ; tibiis anterioribus ad apicem 

 oblique truncatis ; tibiis posterioribus subrotundatis ; tibiis omnibus edentatis. Long. 

 i6-|- mm. 



Hab. Kauai: mountains, 4000 ft. (Harper Pease). 



(6) Apterocychts deccptor, sp. nov. 



A. honohduensis $, Waterhouse, Tr. ent. Soc. London, 1S71, p. 316. 



Niger, peropacus, epistomate medio leviter prominulo, fortiter punctato ; capite sat 

 lato, cantho oculari tere nullo ; prothorace margine parum arguta ; elytris marginibus 

 elevatis fere nullis ; tibiis anterioribus ad apicem oblique truncatis, intermediis externe 

 minute uni-denticulatis. Long. 14^ mm. 



When Mr Waterhouse described A. honoliduciisis he was under the impression 

 that the differences between the two individuals before him were sexual. He has since 

 ascertained by dissection that both of them are certainly males, and that there is a 

 distinct difference in the genitalia of the two. The supposed male of the species is 

 therefore here characterised as a new species ; the only individual known being in the 

 national collection at the British Museum. 



Hab. Kauai : mountains, 4000 ft. (Harper Pease, in Brit. Mus.). 



(7) Apterocychts feminalis. sp. nov. 



Minus depressus, piceus, subnitidus ; mandibulis sat elongatis, edentatis; pro- 

 thorace punctulato, lateribus rotundatis, marginibus tenuibus ; tibiis anterioribus ad 

 apicem rotundato-truncatis. Long. corp. sine mandib. 14 mm., lat. 7-I mm. 



Plate XIII. fig. 2. 



We have only a single individual to represent this form. It has to some extent 

 the characters of a female, but in others is more like a male. It may not improbably 

 be the female of A. adprophiqtians. The mandibles are only sinuate on their inner 

 margins, and are more like those of a degenerate male than of a female Lucanid ; they 

 are widely separated, and there is no trace of a labrum between them. The terminal 

 ventral plate is longer than it is in the other forms. 



Hab. Kauai: 4000 ft. July, 1S96. Found under cow-dung (Perkins). 



