PACHYSCHELUS. 145 



S 17. Pachyschelus secedens. (Tab. VIII. fig. 2.) 



Oblongo-ovatus, nitidus, niger ; capite antice thoracisque lateribus aeneis, hoc fortiter discrete punctato ; 



elytris cyaneis. J $ • 

 Long. \\ lin. 



Eab. Mexico, Tupataro in Guanajuato (Hoge). 



This species is very near to P. ardens, but is of a different coloration and is more 

 depressed. The punctuation of the thorax is less distinct. The elytra are longer 

 and do not begin to narrow posteriorly till behind the middle, so that they appear 

 more parallel* The male characters in the terminal segment of the abdomen are some- 

 what uncertain, as none of the specimens have this part in good condition ; the most 

 perfect examples have the apex produced and truncated, with a slight notch in the 

 middle, and two very small teeth close together at the outer angle of the truncature 

 (fig. 2) ; the specimens are, however, not quite alike, nor are they quite symmetrical. 



A single example from Cordova and three from Northern Sonora (Morrison) appear 

 to be referable to this species, but the latter have the thorax more broadly margined 

 with brassy. 



18. Pachyschelus cyaneus. 



Brachys cyanea, Gory, Mon. iv. p. 344, t. 58. fig. 340 l . 



Hab. Mexico, Teapa in Tabasco (H. H. Smith); Guatemala, San Juan in Vera Paz, 

 El Tumbador 2500 feet (Champion); Panama, Taboga I. (Champion). — Guiana, 

 Cayenne (Brit. Mus.) ; Beazil l . 



The terminal segment of the abdomen of the male is somewhat narrowed, with a 

 deep, narrow incision in the middle, a somewhat obtuse tooth on each side of it, 

 then two broad truncate teeth, and a small acute shorter tooth on the outside. A 

 male specimen from Cayenne shows the same structure, but the teeth are a little 

 shorter. 



S 19. Pachyschelus discoidalis. (Tab. vm. fig. 11.) 



B-otundato-ovalis, convexus, nitidus, subtus niger ; capite violaceo ( <$ ) vel viridi-seneo ( $ ) ; thorace elytrq- 



rumque marginibus violaceis ; scutello elytrorumque disco rufo-cupreis. 

 Long. I3 lin. 



Sab. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 



This very handsome species is much more rotundate than any of the preceding. The 

 thorax is nearly smooth, with the sides finely granular. The females have the anterior 

 angles brassy-green. The elytra fit close to the thorax at the base, gradually widen for 

 one third their length, and are then arcuately narrowed to the apex ; striate-punclate, 

 with a few punctures on the interstices ; reddish-coppery, with a broad bluish-purple 

 margin. The terminal segment of the abdomen in the male is not produced, but has 



biol. centr.-amek., Coleopt., Vol. III. Pt. 1, November 1889. XJ 



VA . % O 



