On some new Species of Prionidaj. 221 



the coeloinic cavity of somite xi and further inpushings of the 

 ectoderm. In all of the preceding sections the somatopleuric 

 wall is the thicker. 



Fig. i. In this figure the ccelome of somite vn is much reduced in size. 

 The coelome of vm is beginning to thrust itself into the append- 

 age, which is marked oft* by a shallow groove in front and by a 

 deeper inpushing, which has a forward direction, between 

 somites viii and IX. 



Fig. 5. In this section the inpushing seen in fig. 4 has gone much further, 

 dividing the ccelome of somite viii into two parts. On the inner 

 wall of the appendage are two inpushings, which are the be- 

 ginnings of the lamellae of the lung-book. 



Fig. 6. A section of the appendage of somite viii cut at a different angle 

 from the preceding. Here four lauielhe are seen. 



Fig. 7. A sagittal section from a stage just after the inversion of the 

 embryo. 



Fig. 8. A section of the appendage of the ix somite, showing at the 

 inner end of the inpushing the beginning of the tracheal tubes. 



Fig. 9. A section of the tracheal region after the reversion of the 

 embryo. 



Fig. 10. This figure is a representation of the ventral surface of an embryo 

 which is about the same age as those from which sections seen 

 in figs. 5, 6, and 8 were cut. 



XXXI. — Descriptions of some new Species of Prionidse. By 

 C. J. Gahan, M.A., of the British Museum (Natural 

 History) . 



Prionocalus Gunteri, sp. n. 



<5 . Niger, subnitidus ; femorum basibus subtus, tibiis, tarsis, palpis 

 antennisque piceo-castaneis, his basi nigrescentibus ; rnandibulis 

 elongatis, curvatis, sat dense sed non rugose punctatis ; capite 

 prothoraceque fortiter creberrimcque rugoso-punctatis ; capite 

 supra bicarinato, carinis leviter curvatis, sat prominentibus, late- 

 raliter utrinque pone ociilum tuberculo conico magno instructo ; 

 elytris sat brevibus, subtriangularibus, supra passim creberrime 

 vermiculato-rugosis ; margine laterali ad apicem prominentias 

 humeralis acutissime angulato vel dentato ; abdomine minutissime 

 punctulato. 



Long. corp. 45 mm., mandib. 15 mm., lat. max. elytrorum 19 mm. 



Hab, Zoruma, in Ecuador {!'. F. Gunter). 



This species seems to be on the whole most nearly allied 

 to P. iphis, White, though it is easily to be distinguished at 

 first sight by the relatively shorter and broader form of the 

 elytra. It differs further in having a very sharp angle or 

 tooth at the apex of the somewhat backwardly-turned promi- 

 nence placed at the shoulder of each elytron, and by having 



Ann. <Sa Mag. N. Hist. Ser. 6. Vol, xiv. 16 



