1916.] 81 



Hob.: S. E. Borneo, Martapura (Doherty). 



One specimen, captured in 1891, from the Sharp Collection. 

 Apparently very near the Malayan Synchroina tenuipennis, but with 

 the elytra so rapidly narrowed from a little below the base as to appear 

 cuneiform, the suture broadly infuscate, and the sutviral stria deeply 

 impressed along the apical third. 



ISCHYOMIINA. 



IscHYOMius Clievr. 



When my remarks on this monotypic Tropical American genus 

 were written (B. C.-Am., Coleopt., IV, I pp. 258, 259, 1886), a single 

 species only was known to me, this being a common insect in Chiriqui. 

 Three others have recently been detected in the Museum, one of which, 

 from Colombia, agrees better with Chevrolat's very brief diagnosis of 

 I. singnlaris than the Chiriqui specimens referred by me to his species. 

 These latter, therefore, require a new name. The characters of 

 Ischyomms were given in detail {I.e.). The genus was at first placed 

 under Tenebrionidae, and subsequently transferred (oj). cit. iv, 2, p. 97) 

 to Melandryidae, on account of the open anterior coxal cavities. 



1. — Ischyomms singularis. 



Ischyomius singularis Chevr. Mittheil. Miinch. ent. Ver. ii, p. 98 

 (1878) (nee Champ.). Amphora complanata de Breme in litt. 



Hah. : Colombia, Honda and Bogota. 



Two specimens from Colombia (one of which was received by the , 

 Museum in 1846, under the MS. name of Aynphora* complanata. de 

 Breme, the other acquired with the Bowring Collection in 1871) are 

 doubtless referable to I. singnlaris Chevrolat, from the same country, 

 as they show a definite angulation at the sides of the prothorax 

 above the deflexed anterior angles, which is altogether wanting in the 

 long series of the Chiriqui insect identified by me as that species. 

 The definition of the prothorax as having " angulis quatuor rectis, 

 acutis " must have been inaccurate as regards the anterior angles, 

 and the same remark applies to " scutellum rotundatum." 



2. — Ischyomius denticollis, n. sp. 



Very elongate, shining, testaceous, the elytral suture slightly infuscate ; 

 the punctuation of the upper surface moderately coarse, scattered, and irregular ; 



* This generic name was used fur a Curculiouid by Wollaston in 1854. 



