CERAMBYCID^E 283 



pale testaceous; punctures of the head and pronotum much finer and 

 more remotely scattered than in any of the preceding, the pro- 

 thorax a little longer than wide, parallel, evenly and rather strongly 

 rounded at the sides, subconstricted at the base as usual, convex, 

 distinctly narrower than the elytra; scutellum relatively not so 

 small though nearly nude; elytra more than twice as long as wide, 

 not parallel as in the preceding forms but gradually narrowed from 

 base to the rather narrowly rounded apices, not at all swollen behind 

 the middle, the punctures smaller, very minute and even more 

 remotely scattered, the fasciae nearly similar, the posterior shorter, 

 being more widely interrupted at the suture; legs nearly as in nitidus, 

 rather short and relatively small, though the femora are strongly 

 clavate; punctures of the prosternum (cf ) coarser and more conspic- 

 uous than in nitidus, close, almost crowded. Length (d") 4.6 

 mm.; width 1.25 mm. California (locality unrecorded). 



exilis n. sp. 



Group IV. 

 Subgenus Microcallidium nov. 



The typical forms are allied to the preceding in the very short 

 tarsi, but differ conspicuously in general habitus, as well as in the 

 completely divided eyes; the species more closely resemble minute 

 members of the restricted genus Callidium than any usual form 

 of Phymatodes. With the typical species, amcenum Say, are asso- 

 ciated for the present two narrower and more convex species, which 

 differ greatly in their undivided eyes. The species known to me 

 may be easily known as follows: 



Elytra evenly and strongly, not densely punctate; form broader and more 

 depressed 2 



Elytra less coarsely and more closely punctate; form narrow and sub- 

 cylindric, eyes not divided 3 



2 Oblong, feebly convex, strongly shining, pale testaceous throughout 

 above and beneath, except the elytra, which are of a uniform dark 

 steel-blue and the antennae and tibiae, which are black, the former 

 picescent distally, the tarsi piceous; vestiture sparse, erect, rather 

 short; head small, strongly and rather loosely punctate; antennae 

 very slender, as long as the body (cf) or shorter (9), the second 

 joint fully half as long as the third, slender; prothorax small, very 

 much narrower than the elytra, subprominently swollen at the sides 

 and widest well behind the middle, the punctures distinct, sparsely 

 and irregularly scattered, the surface broadly impressed along each 

 side of the median line basally and also very feebly, transversely 

 impressed apically; base a little narrower than the apex; scutellum 

 well developed, nude, pale in color; elytra barely twice as long as 

 wide, parallel, rapidly and very obtusely rounded at tip, the punc- 

 tures comparatively coarse, impressed; legs rather short, subsimilar 



