300 LAMELLICORNIA. 



only definite character which separates the species from C. signata. The three examples 

 before me are females, which renders more difficult the determination of the species ; 

 the one from Ecuador, however, exactly agrees in colour with Burmeister's description. 

 The elytral callus is on the dilated margin, and near to the outer apex; close to it the 

 surface is depressed, and anterior to it the margin is thickened. 



3. Cyclocephala detecta. (Tab. XVII. fig. 16, e .) 



0. stictim similis, sed differt clypeo (lato subquadrato) antice cum angulis rotundato, supra creberrime subtiliter 

 punctulato margine antice reflexo, fronte et vertice paullo sparsius punctulatis, illo utrinque punctis 

 setiferis majoribus. Elongata (thorace amplo rotundato), flavo-testacea, polita ; vertice, thoraee vittis duabus 

 elytrisque utrinque maculis duabus vel tribus (2 vel 1 anticis, 1 postica, macula anteriore interiore valde 

 obliqua), abdomine cum pygidio nigro-fuscis ; thorace disco sparsissime punctulato, lateribus (prsecipue 

 versus angulos anticos) grosse sed sparsim setifero-punctatis ; elytris subtiliter punctulatis punctis majori- 

 bus sparsis setiferis, striisque geminatis juxta costas. Pygidium convexum, longe Mvo-setosum. 



Long. 16 millim. <S . 



Hab. Mexico, Orizaba, Chiapas (Salle) ; Nicakagua (ex coll. Cutter). 



Two Mexican specimens in the Salle collection are labelled C. stictica, Burm., from 

 the other male examples of which in the same collection they differ in the broader, 

 obtusely-square form of the clypeus, and in the absence of apical sinuation, and the 

 fine and close sculpture, which renders the surface of the clypeus opaque. In these 

 respects the species comes nearer to the South-Brazilian C. variabilis, Burm., from 

 which in fact C. detecta differs only in the more broadly rounded thorax, the broader 

 clypeus, and the more distinctly black-edged elytral suture. From C. signata it differs 

 in the more ample clypeus and fine scattered punctuation of the disc of the thorax, 

 besides being a larger insect. The male is further distinguished from the corresponding 

 sex of both C. variabilis and G. signata by the third and fourth joints of the anterior 

 tarsi being smooth, and not finely strigose. 



We figure an individual from Chiapas. 



4. Cyclocephala stictica. (Tab. xvil. fig. VI, s.) 



Cyclocephala stictica, Burm. Handb. der Ent. v. p. 66 \ 



Hab. Mexico \ Orizaba, San Andres Tuxtla (Salle), Cordova, Misantla (Edge). 



A good series of examples. Burmeister placed this species in a section far apart 

 from that to which he referred C. signata and its allies, on account of its sinuated 

 clypeus. This single character, which in some examples is only very slightly developed, 

 ought not, I think, to outweigh the other numerous signs of close affinity. The lateral 

 callus of the female is large and wholly superficial, leaving the elytral margin con- 

 tinuous and normal. The major claw in the male fore tarsi is entire. 



A Misantla specimen is figured. 



