CERAMBYCID.E 227 



stoma or guatemahnsis, and I have therefore proposed for them 

 the genus named Paramallns in the tabular statement give above. 



*Aplagiognathus guatemalensis n. sp. Male elongate, parallel, feebly 

 convex and shining, blackish-castaneous throughout in color, the legs 

 and antennae black with a slightly piceous tinge; head extremely coarsely 

 and densely punctato-rugose throughout, coarsely rufo-pilose apically, 

 furrowed along the middle, the antenna? about attaining basal third of 

 the elytra, slender, the basal joint coarsely punctate internally, third 

 and fourth joints about twice as long as wide; mandibles stout, coarsely, 

 not densely punctate, not quite as long as the width of the interocular 

 surface, the upper line having rather less slope than that of the vertex 

 and front and straight, feebly swollen near base, the exterior outline from 

 above nearly straight, rounding inward slightly at base, the apex ab- 

 ruptly inflexed, conically aciculate and smooth, the internal teeth three 

 in number, obtuse, the two anterior completely fused together, the tip 

 obtusely bifid, the internal erect hairs abundant, stiff and pale red-brown; 

 prothorax nearly twice as wide as long, the sides parallel, feebly arcuate 

 and with many uneven, small and obtuse dentelures, obliquely sinuate 

 and bidentate at base; surface very coarsely, densely punctato-rugose but 

 with two large oblique median convexities polished and nearly impunc- 

 tate, and a similarly shining and sparsely punctate transverse area at 

 base; side slopes moderate, with a short tumid smooth line medially near 

 the shining convexities; apical margin broadly sinuate, becoming still 

 more deeply sinuate at the middle; elytra scarcely at all wider than the 

 prothorax, twice as long as wide, parallel and feebly arcuate at the sides, 

 obtuse at apex, the sutural angles not at all dentate or spinose; surface 

 nearly smooth, minutely, sparsely punctulate, feebly impressed sub- 

 laterally from near basal third, evanescently so apically; two fine and 

 subelevated lines on each are barely evident; anterior tibia? with the 

 outer distal angle acutely prominent but at some distance from the tip; 

 met-episterna broad, parallel; tarsi moderately dilated, the third joint 

 much more coarsely papillose beneath than the two basal joints; fifth 

 ventral transverse, broadly rounded and densely, rufously fringed, be- 

 coming sinuato-truncate medially. Length (exclusive of the mandibles) 

 45.0 mm.; width 15.3 mm. Guatemala (Esquintla). 



It is not at all certain that this species can be clearly associated 

 with spinosus or hybostoma, because of the absence of the notably 

 long, slender and aciculate spines along the lateral edges of the 

 prothorax; but, if not, there is no other genus indicated in the 

 "Biologia" that can receive it so far as discoverable. 



Paramallus n. gen. 



The type of this genus is the Mallodon melanopus Linn., of our 

 lists. The reasons for separating it and its allies from Aplagio- 

 gnathus have been given under that genus, and it requires only 



