RHAPHIDORRHYNCnUS CONSANGU INEUS. 249 



are different. From R. mexicanus Senna , the new species is 

 distinguishable by the head which is slightly narrower and 

 channelled on the front , by the 2n'l joint of the antennae 

 which is longer, hardly shorter than the S'''^, whilst in 

 R. mexicanus it is distinctly shorter than the S*"^; by the 

 rostrum which is less rounded at the sides of the tip , by 

 the 2"d interstice which is narrower towards the middle , 

 and by the S^d being broader in the basal half; the dispo- 

 sition of the ferruginous lines is also different, the head 

 and basal portion of the rostrum beneath are more scabrous 

 and without punctures , the 2"<i joint of the anterior tarsi 

 is longer. 



As hitherto the male of R. panamensis Senna is unknown 

 to me, I have compared the female of it with the female 

 of R. consanguineus , and this latter differs chiefly by the 

 1st and 2iid interstices which are narrower and less depressed, 

 and by the S""^ being broader. The disposition of the coloured 

 lines on the elytra is the same in the two species, but the 

 teguments are more brilliant in the first. 



Rhapkidorrhynchus panamensis Senna 

 (1. c. p. 609). 



A female from Nicaragua. 



The body is moderately slender , but the character of 

 the elytral interstices is well evident and identical with 

 the type. 



P hymechus , n. g. 

 (;//UjCt« = tuber, £%&;== habeo). 



Caput breve, supra rugosum, irregulare, in medio rude 

 impressum , utrinque crasse auriculatum , auriculis retror- 

 sum prolatis , obtusis, et super oculos, a latere visis, in 

 carinam prolungatis. Rostrum modice elongatum, capite 

 angustius, parte basali gradatim attenuata usque ad anten- 

 nas, supra rude sulcata, parte apicali longiore, subqua- 



Notes from the lueyden Museum , Vol. XVI. 



