366 Mr. G. J. Arrow on the 



the sides of an insect is tlierefore a sufficient indication of 

 membersiiip of the genus Macraspis. 



The genus Antichira, as restricted by Dr. Ohaus to the 

 species without this apparatus, contains only a small part of 

 the old genus. In addition to the species enumerated by 

 Dr. Ohaus ten others in the British Museum collection belong 

 to Antichira, all of the remaining forms known to me, with 

 the exception of those already dealt with, becoming members 

 of the genus Macraspia. The ten are as follows : — 



A. bicolor, Oliv. A. fulgida, Waterh. 



A. tseniata, Perty. A. cuprina, Laj:). 



A. iuaurata, Burm. A. subaenea, Burm. 



A. isthmica, sp. n. A. Adamsi, Waterh. 



A. calcarata, Spin. A. substriata, Waterh. 



The insect assigned in tlie ' Biologia Centrali- Americana ' 

 to the South-American species A. chlorophana, Burm. {A. cor- 

 rusca, Serv., according to Dr. Ohaus), is an undescribed 

 form differing from it in many sufficiently evident characters. 

 It is larger and relatively broader, with a considerably larger 

 scutellum, scarcely less than a third the length of the elytra 

 at the suture, while that of Burmeister's insect is one-fourth 

 only. The striation of the elytra in the latter is also much 

 more distinct, and the form of the mesosternal process is con- 

 spicuously different, having a truncate club at its extremity 

 in A. chlorophana, while in the Panama species it is of almost 

 equal thickness throughout and rounded at the end. The 

 diagnosis of the new species is as follows : — 



Antichira isthmica^ sp. n. 



Ovata, eubdepressa, roseo-lutea vel viridis, corpore subtus, pygidio 

 pedibusque fueco-viridia plus miiiusve rosois ; clypoo producto, 

 crebre punctato, vertice, prothorace scutelloquo subtilissime punc- 

 tatis, hoc apice infuscato ; elytris irregulariter punctatis, vix 

 Btriatis ; pygidio grosse strigato ; processu mesosteruali elongate, 

 curvato, ncc clavato. 



Long. 27 mm. 



Ilah. Nicaragua, Chontales; Panama, Chiriqui. 



Another Central- American species, Macraspis catomelcena, 

 D)hrn, is a variety of M. trijida, Burm., an insect which, 

 like tlie allied forms M. cincta and M. variabilis, is exceed- 

 ingly variable in coloration. 



lUacraspis aterrima, Waterh., figures in Nonfricd's Supple- 

 mentary Catalogue of RutelidoB, in the Berl. Ent. Zeit. 1892, 



