52 MEMOIRS ON THE COLEOPTERA 



apex comically prominent in profile; tooth of the anterior tibiae 

 obtuse but very distinct; hind tibiae distinctly longer than the femora 

 or tarsi. Length (9) 12.3 mm.; width 5.7 mm. Mexico (Pte. de 

 Ixtla, Morelos), Wickham *morelosana n. sp. 



6 Basal bead of the pronotum completely and moderately widely effaced 

 at the middle. Body deep shining black, without metallic lustre, 

 the pronotum blue-black, the elytral sulci pale at the bottom, the 

 very uniform costaa deep black and polished; legs deep black, the 

 hind femora flavate, black in less than lower half; head nearly as in 

 the preceding but a little smaller, barely half as wide as the pro- 

 thorax, the clypeus black, relatively larger, with rather less rounded 

 angles, the edges similarly very moderately reflexed; antennal club 

 shorter, more oval and distinctly shorter than the preceding five 

 joints; prothorax but little shorter than wide, the feebly arcuate 

 sides becoming slightly sinuate apically, where the angles are very 

 acute and prominent, the basal very obtuse and rounded; surface 

 medially sulcate as in the preceding, but with the sulcus attaining 

 basal sixth; in the type of morelosana it abruptly terminates a little 

 behind the middle and thence to the base is continued by a fine 

 incised line; lateral fossae as in the preceding but with the inter- 

 vening ridge very rugose; punctures stronger and much more nu- 

 merous, small, feeble and sparse medially, rather coarse and close 

 laterally; scutellum with rather small but deep, sparse punctures, 

 the sulcus obliterated before the middle; elytra nearly as in the 

 preceding; pygidium much more arcuate and more deflexed in profile, 

 very obtusely tumid apically, shining, with shorter and still sparser 

 erect pale hairs, the sculpture much more feeble, the lines well 

 separated, more interlacing than in morelosana; anterior tibiae with 

 the external tooth small but distinct, triangular; hind tibiae still 

 longer. Length (9 ) n.8 mm.; width 6. 2 mm. Mexico (Rio Balsas, 

 Guerrero), Wickham *radula n. sp. 



Basal bead of the pronotum finer but entire, not at all interrupted 

 medially 7 



7 Form decidedly stout, black, the met-episterna and hind femora pallid 

 and with opalescent metallic lustre, the latter black along the lower 

 edge; head and pronotum black, with strong metallic lustre, the 

 latter more or less pale and with brighter lustre laterally; elytra pale, 

 with the ridges black; head half as wide as the prothorax, coarsely 

 and rather loosely punctato-rugose, the clypeus trapezoidal, with 

 moderately rounded angles and with the edges throughout abruptly 

 and rather strongly reflexed; antennal club fully as long as the five 

 preceding joints; ligula shining and perfectly flat; prothorax rather 

 small, slightly shorter than wide, the sides parallel and feebly arcuate 

 in basal two-thirds, then converging and straight or feebly sinuate 

 to the very acute and prominent apical angles, the basal moderately 

 rounded; surface rather coarsely, not very closely punctate, more 

 finely and sparsely medially, except apically, the sulcus extending 

 from apex to well behind the middle, the lateral fossae deep but 

 smaller and shorter than in any of the preceding species, the sub- 

 lateral pit rounded and isolated; pubescence long, sparse and erect, 



