150 GEO. H. HORN, M. D. 



the terminal joint subeylindrical obtuse at tip. Mentum deeply emarginate and 

 with a slender acute tooth. Ligula slender acute and bisetose at tip, the paraglossse 

 broad, membranous, adhering to the ligula to the tip and prolonged beyond it but 

 not becoming united, the palpi stout, terminal joint suboylifidrical, obtuse at tip, 

 with short ciliae on its inner side, penultimate joint bisetose in front. Thorax 

 elongate the margin with a coarsely dentate expansion and without setigerous 

 punctures. Seutellum distinct. Elytra (less the expansion) oblong-oval, truncate 

 at tip, the sutural angle acute, base not margined, very narrowly embracing the 

 body, the margin acute and expanded in a foliaceous plate which is prolonged 

 beyond the apices of the elytra, surface striate, the third interval with three 

 dorsal punctures each situated in a small tubercle. Prosternum not prolonged, 

 the thoracic sutures obsolete. Mesosternum narrowly separating the coxse, the 

 epimera broad and attaining the coxse. Metasternal episterna also attaining the 

 middle coxse, the epimera distinct. Posterior coxse contiguous. Legs long and 

 slender, middle tibise ciliate near the tip, posterior tibiae not ciliate, anterior tibiae 

 emarginate within, the spurs on all the tibise ^mall. Tarsi similar in the sexes, 

 slender, the first joint as long as the next three and with short hairs beneath, the 

 other joints not ciliate. Claws simple. 



This tribe is represented by the single genus Mormolyce containing 

 three species which occur in Java and adjacent regions. It is especially 

 remarkable in being the only exception, as far as I know, to the value of 

 the mesosternal epimeron in determining the position of a genus in the 

 Carabide series. In the preceding pages I have attempted to demonstrate 

 that Siagona and the Ozjenini have the mesosternum formed in the 

 manner normal to the present sub-family. It will also be observed by 

 the figure of the under side of Mormoltjce (PI. Ill, fig. 3), that the 

 metasternal episterna also reach the middle coxa3, a character entirely 

 without parallel in all the Carabidae although quite common in Dytiscidae 

 and present in Amphizoa. 



The position of the genus after disregarding the anomalous sternal 

 structure is still open to discussion. The association of it with the 

 Feronides (Pterostichiui) by the older authors is now generally abandoned 

 and all seem to agree that it is a true Truncatipenne. Chaudoir (Bull. 

 Mosc. 1848, i, p. 123), indicated for it a position near Thyreopteriis an 

 opinion since repeated (Ann. Belg. xii, 1869, p. 133), but with Avhich 

 I can not agree. Even the most enthusiastic advocates of such an idea 

 must admit that it is about as unlike the other genera of the Thyre- 

 opterides of Chaudoir as it is unlike an ordinary Lebia. 



Those whose range of study extends over the entire Coleoptera have 

 observed that genera occur in very many families in which the species, 

 by the enormous development of some members of the external portion 

 of the body, assume a form or appearance entirely concealing the true 

 relationship. Instances of mimicry are numerous but these are foreign 

 to the idea at present intended. ^ 



