264 Mr. C. J. Gahan's additions to the 



summit of each of tlie two conical tubercles of the disk to the base 

 of the prothorax. Elytra each with an obtuse costa, which ante- 

 riorly is somewhat more prominent, and furnished above witli 

 minute graniJes ; some similar granules are placed over the 

 shoulders. The black spots or markings are seven in number on 

 each elytron ; four (1st, 3rd, 5th, and 7th) being placed along the 

 side, and three on the disk ; the second is shaped somewhat like 

 the Greek letter v, the sixth like a v. Some small black points 

 form a row on each side of the apical half of the suture. Apices of 

 the elytra truncate. Legs and under side of body with a greyish 

 white pubescence ; tibiae ringed with fuscous ; tarsi above, first 

 joint excepted, dark brown. Antennae in the female extending a 

 little beyond the middle of the elytra, grey, with the last two joints 

 and the apices of the preceding joints brownish black ; apices of 

 the third, fourth, and fifth joints with a short thick fringe of black 

 hairs underneatli. 



A small specimen from Chiapas (length, 8 mm.), in 

 the British Museum collection, appears to be the male 

 of this, or of a very closely allied species. In this speci- 

 men the last three joints of the antenna, as well as the 

 apices of the preceding joints, are rather thickly ciliate 

 underneath ; the dorsal costs of the elytra can be dis- 

 tinguished only near the base, and the basal granules 

 are wanting ; the fourth and fifth black spots of each 

 elytron are united to form a very irregular transverse 

 fascia extending from the outer margin almost up to the 

 suture ; the sides of the prothorax below the lateral 

 tubercles are entirely fuscous ; the under side of the body 

 and the femora underneath are so scantily furnished 

 with greyish hairs that they appear almost entirely 

 black. 



Acanthoderes sp. 



One imperfect example of this species was taken at 

 Mexico city {lloije). It appears to be closely allied to, 

 and may perhaps be only a variety of, A. nigritarsis. 



Acanthoderes nigritarsis, White. 



Cat. Longic. Col. Brit. Mus., ii., p. 363. 



= A. sylvanus, Bates, Biol. Cent. Amer., Col., v., 

 p. 141. 



