PTINID^. 219 



621. Sphaericus marmoratus. 



Sphaericus marmoratus, Woll., Append. Twj. op. 33. 

 Habitat Canarienses (Gom., Hierro), a DD. Crotch nuper lectus. 



Taken by the Messrs. Crotch in Gomera and Hierro, during their 

 late Canarian campaign. By a reference to my diagnosis given in 

 the Appendix, it will be seen that the specimens from those two 

 islands differ a little inter se, but that the differences are so very 

 slight and unimportant that I do not believe they can be indicative 

 of more than insular phases of the species. 



622. Sphaericus Crotchianus. 



Sphamcus Crotchianus, Woll, Cat. Can. Col 242 (1864). 

 Habitat Canarienses (Gfom.), a DD. Crotch copiose repertus. 



Detected by Dr. Crotch at Hermigua, in Gomera, during his first 

 Canarian campaign ; and since captured abundantly, by himself and 

 his brother, in the same locality chiefly " amongst garden-refuse." 



Genus 197. PTINODES (nov. gen.). 

 (Ptinus, Sectio B., Ins. Mad. 271.) 



Corpus et instrumenta cibaria fere ut in Sphcerico, sed antennae, pedes- 

 que fragiles, illcv ad basin distantes ; tarsii breviores, filiformes, 

 articulis l-4 m brevibus, inter se subajqualibus. Corpus nigres- 

 cens, plus minus albido-squamosum ; elytra magis quadrata (nee 

 globosa)*. 



A Ptinus, et elos, forma. 



623. Ptinodes nigrescens. 

 Ptinus nigrescens, Woll., Cat. Mad. Col. 91 (1857). 

 Habitat Maderenses (Mad.), in subeditioribus rarissimus. 



The only specimens which I have seen of this insect were taken 

 by myself (at rather a high elevation) at Feijaa d'Ovelha, in the west 

 of Madeira proper, where, although exceedingly distinct from that 

 species, it may perhaps be regarded as the representative of the Porto 

 Santan P. fragilis. 



* Apart from their structural peculiarity, of basally-distant antennas and 

 shorter, narrower, filiform feet (the four basal joints of which are much abbrevi- 

 ated, and subequal), both of the Ptinodes enumerated above have a different 

 general aspect from the Sphcerici being blacker, though more or less covered 

 (particularly on the head and prothorax) with snowy-white scales, with their 

 elytra rather squarer (or less globose), and the limbs more fragile. 



