120 MEMOIRS ON THE COLEOPTERA 



circularly rounded behind, the eight spots well denned, the scutellar 

 as large as all the others combined; punctures fine, sparse, becoming 

 confused, closer, more distinct and coarsely but briefly pubiferous 

 laterally, the flanks ( 9 ) feebly and irregularly swollen behind the 

 middle, the edge beneath the swelling with a short but abrupt and 

 rather strong deplanation; pygidium (cf ) rather small, very convex, 

 punctulate and with abundant long stiff erect pale hairs, or ( 9 ) 

 much more transverse, less convex, with fewer and shorter hairs and 

 more alutaceous toward the base and sides; abdomen sparsely, 

 rather strongly punctured throughout; sterna moderately punctured 

 and pubescent; hind tarsi (cf) very much, or ( 9 ) only evidently, 

 longer than the tibiae; antennal club small in both sexes. Length 

 (c? 9 ) 20.0-22.0 mm.; width 8.8-11.4 mm. Mexico (Guerrero). 



Four examples *triangulifer n. sp. 



Spot near the scutellum always much larger than any of the others but 

 more rounded, or, if subtriangular, with all the angles much 



rounded 9 



Spot near the scutellum as small as the others and frequently obsolete, 



all the spots notably small 10 



9 Form oblong-oval, stouter than the preceding and scarcely so convex, 

 very shining; head barely more than half as wide as the prothorax, 

 black, with piceo-rufous clypeus, formed nearly as in the preceding 

 but less coarsely and more feebly rugulose, the front similarly 

 sparsely but more unevenly punctate and more evidently bi-im- 

 pressed; prothorax short, twice as wide as long, throughout nearly 

 as in the preceding but with the sublateral dark discal dot larger and 

 more evident; elytra less elongate, broadly circularly rounded behind, 

 the sculpture nearly similar but with the punctures postero-laterally 

 more irregular, stronger and not quite so evidently pubiferous; 

 edge beneath the post-medial swelling similarly deplanate but with 

 the shelf notably longer and still wider; pygidium (9) with similar 

 sparse punctures, bearing stiff sparse erect hairs, but with the general 

 surface basally and laterally much less finely rugulose and less alu- 

 taceous; abdomen similar; middle coxae more widely separated, the 

 flat intermediate surface not concealed by pubescence as it is in the 

 mafaffa section; hind tarsi about as long as the tibiae in the female, 

 the basal joint stouter, subtriangular. Length (9) 20.0 mm.; 

 width n.o mm. Mexico (Jalapa). [Cyclocephala lucida Burm.] 



*lucida Burm. 



A Similar to luci&a, except that the sparse pronotal punctures are 

 everywhere stronger and more distinct and the two middle spots 

 enlarged and elongated, so that they nearly attain apex and base, 

 narrowly separated along the median line and each with broadly 

 rounded external outline; elytra nearly similar, the female with a 

 shorter shelf under the lateral swelling and the pygidium not 

 uniformly pale in color but with a large black spot at each side of 

 the middle. Length (9) 19.0 mm.; width 10.0 mm. Mexico 



(Jalapa) *discoidalis Chev. 



Form oblong-oval, convex, shining; head nearly as in lucida, the clypeus 

 (c?) dark rufous, two-thirds wider than long, shallowly and sparsely 



