MACROMANTIS.— METKIOMANTIS. 151 



Only one (male) specimen existing in the collection, we are unable to state for certain 

 whether the Central-American insect really belongs to M. ovalifolia, Stoll. The 

 Nicaraguan male differs as follows from males of the typical species from Guiana : — 

 The marginal field of the elytra is green up to its base, with a small irregular hyaline 

 space along the principal vein at the base; the wings are somewhat more densely 

 reticulated, and their costal border is green only at its extremity. The cerci are 

 distinctly different, as described, but perhaps only on account of individual variation. 



[2. Macromantis hyalina, De Geer. 



Mantis hyalina, De Geer, Mem. des Ins. iii. p. 410. 4, t. 37. fig. 1 ( <?) (1778) j Stoll, Kakkerl. t. 20. 



fig. 75 (<f) (1787). 

 Macromantis hyalina, Sauss. Mem. Mex., Mantid. p. 79. 2 (<$); Miss. Scient. Mex., Orthopt. 



p. 270. 1 (<?); Westw. Revis. Mantid. p. 15. 



Hal. Teopical Ameeica ; Guiana, Surinam.] 



[METRIOMANTIS * gen. nov. 



Cardioptera (ex parte), Saussure, Mem. Mex. Mantid. p. 68. 



Insecta staturse mediocri, generi Macromantidi hand dissimilia. Pedes antici et caput illis illins generis similia. 

 Pronotum modice longum, anterius parum ampliatum, marginibus dimidise partis basalis denticulatis. 

 Elytra cordiformia (vel late truncata) ; vena principalis ante eornm apicem desinens ; apex elytri hoc 

 propter per campum discoidalem formatus. Lamina supra-analis trigonalis ; cerci teretes, mediocri. 



In the new classification the true Cardiopterw, having carinated tibiae, are removed 

 to the tribe Vatinae. The following species with uncarinated tibiae therefore require 

 a new generic name, for which we propose Metriomantis. The limit of their distri- 

 bution in Tropical America is uncertain, and, like Macromantis and Stagmatoptera, 

 they are likely to extend into Central America. 



Metriomantis should be placed immediately after Macromantis, and it is, so to speak, 

 a diminutive form of that genus. The form is similar ; the head is also large and 

 triangular, flattened in front, with the eyes somewhat tumid laterally beneath. The 

 pronotum, however, is much shorter, and but very slightly widened anteriorly ; the 

 wings have transverse yellow bands, very much as in Stagmomantis (but narrower) ; 

 and the anterior femora have at their outer border six or seven spines. The supra- 

 anal plate is not strongly produced, but wide and triangular. 



The males are as yet unknown ; but it may be assumed, from analogy, that they have 

 hyaline elytra. 



It is possible that the males of some species at present referred to the genus Photzna, 

 Burm., may prove to belong to Metriomantis. 



Some small larvae before us from Central America seem to belong to this genus, 

 perhaps to one of the species here enumerated. - -r 



* fierptos, moderate ; Mantis, — Mantis of moderate size. 



