50 Mr. (Jilliort J. Arrow's Conlnbaiion to the 



The spccimuii from CJuateinalci attributed to, and 

 figured as, S. macuUcollis Gerst., in Biol. Centr.-Amer. 

 vol. vii, although extremely similar, must be separated 

 from it, the antennae being considerably shorter and more 

 compact and the club distinctly larger proportionately 

 to the footstalk. The sides of the proiiotum are more 

 strougly curved and nearly parallel behind, and the raised 

 margins broader. In both species the basal foveae form 

 very deep and strongly oblique channels. 



The Central American species may be called 



Stenotarsus marginalis, sp. n. 



S. inaculicolUs Gerst., really belongs to the section with 

 elongate joints to the footstalk of the antenna. 



The genus evidently forms exceedingly numerous local 

 races in Tropical America, some of them having slight 

 structural differences, while some, like S. tarsalis Gorh., 

 seem to me no more than colour varieties (the latter of 

 S. circumdalus Gerst.). Gorham has pointed out nothing 

 to distinguish his S. cordahis from S. globosus Guer., and 

 I have found nothing. The difference in the size of the 

 thorax shown in his figures is quite imaginary. He evidently 

 did not compare his specimens or he would have found 

 the length of the legs to be distinctive of the males of 

 S. glohosvs. 



The specimens from Guatemala referred by him to 

 S. orbicularis Gerst., do not agree in the least with the 

 description of that species. They have no resemblance to 

 S. rubicmulns and are not at all orbicular. As Gorham 

 has described the form it is sufficient to give it a name 

 and I propose to call it 



Stenotarsus ovalis, sp. n. 



It is almost regularly oval in shape, with the shoulders 

 less prominent and the elytra less cojivex than in ;S'. globosvs. 

 There are two specimens, male and female, the male 

 having the legs and antennae elongated, as in S. globosus. 



The specimen from Panama is not conspecific with the 

 last. Its pronotum is more closely punctured, the sides 

 less strongly rounded, the front angles less prominetit, and 

 the lateral margins much narrower. It may be called 



