CERAMBYCID.E 299 



apices somewhat different, similarly sinuate and with similar sutural 

 spine, the outer limit however not spiniform but rather prominently 

 and acutely dentate, the tooth broad basally and not quite as long as the 

 sutural spine; under surface much less densely pubescent, the fifth ventral 

 narrower and longer. Length (9) 26.5 mm.; width 7.8 mm. Texas. 



The form of the prothorax in the female of ritfulum is rather 

 obtrapezoidal, with broadly and feebly arcuate sides, the greatest 

 width being anteriorly and the apex much wider than the base; the 

 surface also is less convex than in crinicorne and the vestiture, as 

 well as that of the remainder of the body and especially of the under 

 surface, less dense; these divergencies, together with the larger and 

 stouter body and form of the elytral apices, will readily serve to 

 distinguish the two species. The antennae are similarly pubescent, 

 the fringe along the under side of the joints conspicuous. 



Hypermallus Lac. 



The rather numerous species of this genus have never been 

 adequately studied; they have a rather monotonous appearance, 

 which may be the source of much of this neglect. I would propose 

 the following arrangement of the material now in my collection: 



Form stouter, sometimes of rather large size, the pronotum with large 

 callous spaces 2 



Form narrower, sometimes linear, the pronotum not having smooth 

 areas except on the median line behind the centre 4 



2 Body large; callous areas of the pronotum three in number, the usual 

 two anterior obsolete, the sculpture rather strong and irregularly 

 confluent; sublateral smooth areas elongate, linear and irregular 

 from before the middle to the base, the median spot behind the centre 

 elongate-fusiform, flat; surface with a few small scattered con- 

 densed yellowish spots; elytra two-fifths wider than the prothorax and 

 not quite four times as long, feebly tapering throughout, the apices 

 truncate, with a small but distinct sutural spine and broad and rather 

 acutely prominent lateral tooth; punctures very coarse toward base; 

 pubescence sparsely variegated. Length 20.5-23.5 mm.; width 

 5.6-5.9 mm. Arizona arizonensis Csy. 



Body moderate to small in size, the polished callous areas of the pronotum 

 five in number '. 3 



3 Moderately large, rather stout, dark red-brown, with sparse and 

 rather fine condensed spots on the elytra; prothorax about a third 

 wider than long, the entire median line broadly smooth and feebly 

 swollen, narrow anteriorly, the basal of the sublateral smooth tumid- 

 ities elongate, the anterior and less lateral smaller and rounded; 

 punctures (9 ) coarse and close but not confluent, notably varying 

 in size, the hairs coarse, sparse and subuniform; elytra subparallel, 



