358 MEMOIRS ON THE COLEOPTERA 



apices, in the stoutness of the antennae and relative form and size 

 of the body, in directions not suggested by the above noted male 

 and female of costulata. This latter species is possibly the one 

 identified as the Cuban filum by Hamilton, but having Chevrolat's 

 description of that species at hand, I am unable to find many points 

 of similarity; the elytral apices, for example, are said to be produced 

 and obliquely truncate ; they are rather prominent but not produced 

 in costulata and scapalis, and the inner edge is thence very oblique 

 and rounded anteriorly to the suture.* Both costulata and scapalis 

 are allied much more closely to grandis Chev., but neither seems to 

 be identical. 



Tribe PHYTCECIINI. 



Saperda Fabr. 



A very good account of pur species, especially with reference to 

 injuries to vegetation, was given by Mr. E. P. Felt (Bull. Univ. 

 State of New York, June 1904) and all the species are there figured. 

 There remains but little to do therefore in this genus, except to 

 define a few forms, bearing deceptive resemblances to others, 

 that were overlooked in Mr. Felt's revision. This particularly 

 concerns the tridentata group, where my series may be resolved into 

 two species, tridentata Oliv. and imitans Joutel and the following 

 subspecies: 



* I have recently had an opportunity to compare the male of costulata directly with 

 the same sex of the Cuban filum, as represented by a good series in the National 

 Museum, collected by Mr. Schwarz. Chevrolat describes the thoracic punctures of 

 filum, and it was difficult to understand how this could be done if covered by so dense 

 a crust of vestiture as in costulata. The comparison explains this very well, as the 

 vestiture in filum does not form quite so dense a crust, and the punctures are there- 

 fore visible to some extent. Filum differs from costulata in its more slender form, 

 shorter and very much more slender antennae, with shorter, more slender and even 

 less pubescent scape, less costulate elytra and transversely truncate and not sinuate 

 apex of the fifth male ventral; the elytral apices are of nearly the same form, but the 

 dorsal concavity of the tips, so conspicuous in costulata, is almost obsolete in filum; 

 in fact the two are abundantly distinct species. There are large specimens included 

 in the museum series, which appear to be grandis Chev., but I have not identified 

 them carefully; scapalis is also allied to grandis but is not the same, according to the 

 description. 



In the museum collection the type series of four examples of suturalis Ham., show 

 that it is different from any species at present in my collection, these differences being 

 expressed satisfactorily in the table. 



