54 TRAVELS AMONGST THE GREAT ANDES. 



Listrus is a genus of small beetles allied to the European Danacceas. In the 

 Bii)logia Centrali Americana eight species are desci'iljed from that region, 

 and al)nut ten others are known, all North American. Kirsch's genus 

 Haplammtrus, of which he has described two species from Bogota, seems to 

 differ from this in having erect hairs and to be nearer to Pristoscelis. 



18. Listrus favipcnnw, n. sp. 



Hah. Machachi to Pedregal (10,000 feet). Five examples. 



Nigro t«neus, antennis pedibustpie ferrugineis elytris, flavo - testaceis, 

 sutura et circum scutellum aniescentibus, capite prothoracec^ue distincte 

 parcius punctatis subtilissime alutaceis, elytris obsoletius punctatis. Long. 

 4-4j millim. 



Head and thorax similar in form and in punctuation to L. frnescens ; 

 antennte with the two basal joints spotted with pitchy, l)ut Avith that excep- 

 tion entirely yellow ; palpi dark, elytra yellow, closely and rather oljsoletely 

 punctate, especially so near the base and suture, the latter pitchy, or Idack 

 and with a black patch I'lnind the scutellum ; the shoulder is I'ather tuber- 

 cular. Legs chestnut yellow, tarsi of the same colour Avith the rest of 

 the legs. 



l''aiii. I'TINID.E. 



19. Trigonogenius squalidvs, Boield, Mon. Ptin., p. (ifi7 ; ('hevr. Ann. Fr., 



1861, p. 389. 

 Hah. Machachi (9-10,000 feet). A single example. 



This is a small alnifist glijbular-bodied Ptinus, with a Ijroad thorax, and 

 covered densely with grey brown scales, and erect Idack hairs on the thorax 

 and elytra. 



Very few Ptiuida' have at pi'csent lieen recorded fiom the South Ameiican 

 continent, this species with one other {T. globulum) being all that have yet 

 been observed, with the exception that Chili has three or four. 



Trigonogenius is a Chilian type, with which have been associated some 

 species from the Atlantic Islands, ami Ijy myself a species from Central 

 America. The species to which we refer Mr. Whymper's Ecuador insect has 

 V)een recorded from Columbia. 



Faiii. HIS PI D.J':. 



20. Arcsciis j^armnfunctatus, n. S2>. 



Hah. Nanegal (3-4000 feet). A single specimen. 



Niger, nitidus capite cornu luto subcpiadrato basi parum amjiliato, prn- 



