528 Entomological Papers. [No. 6. 



Thorax amplissimus, elytris tertia parte minor, convexus, angulis 

 acutis, basi humeros amplectens, apice angustatus. Elytra subde- 

 pressa, subquadrata, apicem versus parum angustata, truncata, 

 abdominis 3-4 segmenta ultima non obtegentia. Tibiae medio in- 

 crassatae. Coxae posticae maxime dilatatae. Mesosternum carinatum. 



Sub veget. putrescent, exsiccescentibus in prov. occid. copiosa. 



A rather large species commonly met with in this part of the 

 Island under rotting vegetable substauces somewhat dried up. It 

 is very agile and ready to take to its wings, which are of the beautiful 

 typical construction, about twice the length of the body and in dead 

 specimens frequently produced behind. These insects vary a little 

 as to shape, some being more narrowed behind than others, and also 

 as to the exact number of the abdominal segments left uncovered by 

 the elytra. The head is large but exhibits nothing abnormal or 

 extraordinary ; the thorax is very large, emarginated in front and 

 behind, with the angles acute, the basal ones enveloping the 

 shoulders ; the wing covers are subquadratic with the angles rounded 

 off and a little narrowed behind ; the legs have the tibiae incrassated 

 in the middle and the posterior coxae very much dilated and distant 

 from each other, in all other respects they are typical. The shape 

 of the body is that of an egg, broadest at the shoulders, gently 

 narrowed towards the apex of the abdomen, and rounded off towards 

 the head. 



17. Tricliopteryx immatura. N". 



T. praecedenti similis, differt tamen colore supra aeneo-testacea, 

 subtus testacea, antennarum art. ,3-11 nigrescentibus ; differt etiam 

 corpore crassiore, magis quadrato, capite paulo majore, thorace minus 

 convexo, parum ampliore, elytris abdomen totum vel fere totum 

 obtegentiis. Pedes, antennae etc. omnino praecedentis. Long. corp. 

 ilin. 



In praecedentis societate specimina nonnulla legi. 



Of somewhat the appearance of an immature individual of the for- 

 mer but sufficiently distinct to be formed into a new species. The in- 

 sect is altogetherof a differentappearance,imparted to it by the greater 

 general plumpness of the body, the larger head, the less convex but 

 at the same time possibly still ampler thorax, the altogether more 



