HYPNOIDUS. 411 



Hah. Mexico, Teapa in Tabasco (Pilate, in coll. Janson ; H. H. Smith). 



Three specimens. This insect is very like the typical form of II. pectoralis (Say) ; 

 but it has the thorax strongly sinuate at the sides behind, with the hind angles acute, 

 longer, and more divergent, and the punctuation a little finer, and the elytra somewhat 

 differently coloured. It is larger and more elongate than any of the other allied 

 Central- American species. The single male example received is very immature. 



5. Hypnoidus quadriplagiatus. (Tab. XVIII. figg. 17; 17 a, underside of 

 the prothorax, d .) 



Oblong, moderately convex, shining ; testaceous, the scutellum infuscate ; the elytra black or piceons, each with 

 a very broad antemedian fascia, narrowing inwardly, and an oval apical patch, neither reaching the suture, 

 testaceous ; beneath ferruginous, the prothorax flavous ; above and beneath very finely and sparsely 

 pubescent. Head closely, finely punctate ; antenna? slender, feebly serrate, about reaching the hind 

 angles of the prothorax. Prothorax broader than long, transversely convex, about equal in width in 

 front and behind, rounded at the sides, the latter strongly sinuate before the base ; the hind angles acute 

 and moderately divergent, unicarinate, the carina short and almost straight ; the surface closely and 

 finely punctate, and with a smooth median line. Elytra about two and one-half times the length of the 

 prothorax, and considerably wider than it at the base, slightly flattened on the disc, arcuately narrowing 

 from the middle ; closely and finely punctate, without trace of stria?. Beneath closely and very finely, 

 the prosternum more sparsely and coarsely, punctured. Prosternum with a narrow, oblong, slightly 

 depressed, densely punctured space in the middle in the male. 



Length 2J-2|, breadth |-1 millim. ( tf ? .) 



Hah. Guatemala, Rio Naranjo (Champion). 



Eight specimens, from the sandy banks of the Rio Naranjo, on the Pacific slope and 

 not far from the Mexican frontier. This species closely resembles H. tetraspilotus, 

 but it is much larger, the hind angles of the thorax are more divergent, the meta- 

 sternum is closely punctured throughout, and the prosternal depression in the male is 

 shallower and oblong in shape ; the elytral markings, too, are different, the sub- 

 triangular lateral patch being placed considerably below the base. These markings 

 extend to the lateral margin, but not to the suture ; the fascia is sometimes reduced in 

 size, forming an oblique mark. 



6. Hypnoidus tetraspilotus. (Tab. XVIII. figg. 18; 18 a, underside of the 

 prothorax, 6 .) 



Oblong, moderately convex, shining ; testaceous or rufo-testaceous, the prothorax sometimes piceous or pitchy- 

 red, with the disc paler ; the elytra black or piceous, with a large triangular patch at the sides in front 

 and an oval mark at the sides at the apex, the latter sometimes extending to the suture behind, testaceous 

 or yellowish (these markings leaving a common subtriangular scutellar patch and a broad postmedian 

 fascia, connected at the suture and extending along it almost to the apex, of the ground-colour) ; the 

 antennae and legs testaceous ; the under surface brownish-testaceous ; above and beneath very finely and 

 sparsely pubescent. Head closely, finely punctate ; antenna? slender, feebly serrate, about reaching the 

 hind angles of the prothorax. Prothorax broader than long, transversely convex, about equal in width 

 in front and behind, rounded at the sides, the latter sinuate before the base ; the hind angles acute and 

 feebly divergent, unicarinate, the carina short and almost straight ; the surface closely, very finely punc- 

 tate, and with a smooth median line. Elytra about two and one-third times the length of the prothorax, 



3G2 



