DIASPIS.— CHLAMYS. 75 



have seen agreeing so far perfectly with Lacordaire's views in regard to this species at 

 least. The figure is from a Cordova specimen. 



2. Diaspis moestifica. 



Chlamys mcestifica, Lacord. Mon. p. 706 *. 

 Hab. California 1 . — Mexico \ Juquila, Capulalpam, Vera Cruz (Salle). 



On account of the double scutellum, this species must also be placed in the 

 present genus ; the second scutellum is very narrow, sometimes almost indistinct ; the 

 elytral tubercles are very much raised and acute ; the space below the scutellum 

 appears black when viewed in a certain light ; and the thorax is acutely bilobed at the 

 top of the callosity. It is not improbable that Lacordaire had for his type specimens 

 which did not show the second scutellum, as it is not likely he would have overlooked 

 it. The specimens before me agree, however, not only with his description but also 

 with two examples in the collection of Mr. Baly, which the latter had also placed in the 

 genus Diaspis. The claw is not bifid in the species before me, being only appendiculate. 



3. Diaspis memnonia. 



Chlamys memnonia, Lacord. Mon. p. 708 \ 

 Hab. Mexico \ Cordova (Salle), Yucatan 1 (Baly) ; Guatemala, Zapote (Champion). 



As already pointed out in my general remarks on this genus, the present species, of 

 which Lacordaire's type is before me (who, however, included it in the genus Chlamys), 

 is somewhat puzzling, the three specimens differing inasmuch as one shows two scutella, 

 the other two only one, but they exhibit no other difference whatever. As the type 

 shows, however, two scutella, I think it best to leave the species at present in the genus 

 Diaspis, in which it was also placed by Mr. Baly. 



CHLAMYS. 



Chlamys, Knoch, Neue Beytr. Ins. i. p. 122 (1801). 



Since Lacordaire's great monograph but few additional species have been made known 

 to science in this genus, although many are contained in different collections. Those which 

 have been described since by Mr. Baly and myself are from the Amazon Eegion, where 

 a good many showy species have their habitat ; those from more northern parts usually 

 assuming more sombre colours. The transverse shape of the antennas of these insects 

 shows their affinity with the Clythrina? ; the globular shape and metallic colour of 

 their bodies in many instances an equal affinity to the Lamprosominse. Lacordaire's 

 division into numerous sections, according to the shape of the antennae, thorax, &c, is 

 often exceedingly difficult to follow, the insects being of a very variable disposition ; it 

 would however, be still more difficult to devise a better system for the determination of 



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