ATHOUS. 457 



b'. Hind angles of the prothorax moderately produced, acute, 

 c". The angles distinctly carinate ; body brown. 



c J ". Propleurse very sparsely punctured, smooth in the middle marcidus. 



d'". Propleurse closely punctured throughout aztecus. 



d". The angles not carinate; body piceous or pitchy-black, the prothorax 



partly rul'ous ; elytra rugose rugipennis. 



b. Tarsi simple. 



d. Prothorax longer than broad, not transversely carinate before the base ; the 

 hind angles short, rather obtuse, and feebly carinate ; front truncate. 



e". Body piceous or pitchy-brown ; prothorax subparallel angusticollis . 



f". Body black ; prothorax narrowing forwards funestus. 



d. Prothorax not so long as broad, with a sharp, transverse, sinuous carina 

 before the base; the hind angles longer, acute, and recurved at the tip, 

 not carinate ; front deeply emarginate ; body black carinicollis. 



1. Athous photinoides, (Tab. XX. figg. 9, 10, ? .) 



$ . Elongate, rather broad, subopaque above (a narrow space down the middle of the prothorax excepted), 

 shining beneath, black ; the prothorax rufous or obscure rufous, with the apical, basal, and lateral margins, 

 the hind angles, and two vittao on the middle of the disc, black or piceous, the fourth and fifth ventral 

 segments yellow, the propleurse in great part rufous ; the head, elytra, and under surface clothed with 

 fine, short, fuscous pubescence, that on the propleurae and on the last two ventral segments paler ; the 

 prothorax with longer and denser pubescence, that on the rufous lateral portions velvety, and golden in 

 colour in certain lights. Head densely, coarsely punctate, deeply triangularly excavate in front, the front 

 moderately prominent and truncate at the apex, the eyes comparatively small ; antennae rather short, 

 extending to a little beyond the humeri, the joints from the third broadly widened and subtriangular, 

 becoming narrower and more parallel outwards, 3 as long as 4. Prothorax broad, transverse, rather 

 convex, campanuliform ;. the hind angles greatly produced, divergent, narrow, acute and strongly 

 recurved at the tip, not carinate ; the surface very closely, finely punctate, the punctuation becoming 

 coarser towards the sides behind and along the middle of the disc, down the centre of which is a smooth, 

 shining, more or less distinctly canaliculate space. Scutellum densely punctured. Elytra three and one- 

 half times the length of the prothorax, and of about the same width as the latter at the base, broadly 

 flattened on the disc, sharply margined at the sides, subparallel to the middle, and gradually narrowing 

 thence to the apex, the apices rounded ; extremely finely and lightly punctate-striate, the interstices quite 

 flat throughout, densely, rugulosely punctate, and at the base finely granulate. Beneath somewhat thickly, 

 finely punctate, the punctures on the prosternum coarser, the rufous portion of the propleurse densely and 

 very finely punctured. Legs rather stout, moderately long ; the third joint of the tarsi slightly dilated 

 and sublamellate, the basal joint of the hind pair a little longer than the following three joints united, 

 the fourth joint very small. 



Length 10|-14|, breadth 3-4| millim. 



Hab. Guatemala, Totonicapam 8500 to 10,500 feet {Champion), Tecpan 7000 feet 

 (Conradt). 



Thirteen specimens, all of which appear to be females. This remarkable insect bears 

 a great resemblance to Photinus guatemalce, Gorh. — a species of Lampyridae occurring 

 at the same locality, — not only in general appearance, but also in the sculpture of the 

 elytra and in the colour of the abdomen. It resembles the Chilian Campyloocenus 

 pyrothorax, Fairm. & Germ.* (l=Pyrophorus megalophysus, Philippi), from which it 



* Gamjpyloxenus pyroihoraoc has a prominent chin-piece to the prosternum ; it is allied to Pyrophorus. 



biol. cents. -amer., Coleopt., Vol. III. Pt. 1, January 1896. 3N 



