14 [June. 



the Ent. Mo. Mag., Nov., 1875, p. 13G, published a note on Trrtpezonotus 

 distiiiguendus, Flor, and its allies, where he says: "According to 

 descriptions, there are four allied species of Trapezonotus, viz. : 

 1. distinguendus, Flor, wee auct. {^= convivus, Stal, sec. Thorns.); 2. 

 distinguendus, Fieb., Stal, Saund., nee Flor ; 3. distinctus, D. and S., 

 Fieb. ( = distinguendus, Flor, sec. Saund.) ; 4. convivus, Stal, nee 

 Thorns." But I think that all these are to be reduced to two species. 

 JPachymeriis distinguendus was described by Flor as having black 

 antenna[>, with the se^o ?j</ joint yellowish-red in the middle ; but Ficber, 

 having seen the type of Flor, corrected the description of Flor, by 

 saying: " the ^/«V^ joint of antenna3 red in the middle." There doca 

 not exist any known species with 07ily the second joint red in the 

 middle. I have, however, examined one specimen from Finland, 

 belonging to the var. distinctus, and in other respects quite agreeing 

 with the diagnosis of Mr. Saunders (Synops., 148, 1), but differing in 

 having the third joint yellowish-red, both ends being being narrowly 

 black {articxdo tertio fere toto rufo, Thoms., Opusc. Ent., ii, 172, 28) 

 and the second joint before the middle with a narrow, dark red ring ; 

 this belongs without doubt to Tr. distinguendus. Tr. distinctus, D. and 

 S., is only a paler ochreous variety ; one specimen, obtained from Mr. 

 Douglas under the name of distinctus, is, however, quite as dark as the 

 true distinguendus, and in no respect differing from it. Tr. convivus, 

 Stal (Stett. Ent. Zeit., xix, 181, 23), is a good, distinct species, occurring 

 in Siberia but not yet found in Europe, having the second and third 

 joints of the antennje, largely red in the middle, the elongate triangular 

 spot on each side of the scutellum much longer and confluent with the 

 yellow apex of the scutellum, the elytra scarcely darker towards the 

 apex, &c. I have seen a great many specimens of this very little- 

 variable species. 



\_Trapezo)iotus distinctus, Fieb., as now elucidated, may be only a variety of 

 T. distinguendus, Flor, yet it is curious that Fieber, -who had before him at the same 

 time the original example of each, does not hint at the possibility, but compares 

 T. distinctus with Peritrechus nuhilus. Fall., and P. angusticollis, Salilb. (Wien. ent. 

 Monats., vili, 215).— J. W. D.] 



Plinthisus bidekttjlus (Catal., 17, 2, and Saund., Synops., 154, 2) 

 is only a long- winged form of the PI. hrevipennis, Latr. 



\_Flinthisiis bidenttdus, I think, may be accepted as the macropterous form of 

 P. hrevipennis, Latr. (vide p. 19 post.) — J. W. D.] 



{To be continued.) ' / 



