176 Rev. T. A. Marshall's monograph of 



articulation obsolete, the other sutures distinct ; apical segments 

 of the 2 curved under the abdomen, so that the short terebra 

 points forwards. Wings nearly as in the last subfamily, but the 

 radius is curved, and its 1st abscissa much shorter than the thick- 

 ness of the stigma. 



The genus Liophron of Nees v. Esenbeck, established 

 in 1819, indicates species with 2 cubital areolets, and 

 the abdomen of the ? decurved. In his monograph 

 (i., 43) he describes 3, which now belong to as many 

 different genera ; L. falcatus is a Pygostolus, and is 

 referred to the Blacides ; L. clavipes, from Italy, has 

 the abdomen margined, and belongs to some different 

 tribe ; L. ater belongs to the present group. Wesmael 

 described 4 species of Liophron, taking what he sup- 

 posed to be the L. ater, Nees, for his type ; the ater, 

 Wesm,, however, is not identical with ater, Nees, but 

 with Bracon lucidator, Nees. The species known to 

 AVesmael belong to two genera w^hich Haliday named 

 Ancylus and Centistes, but for Ancylns he afterwards 

 restored the original name Liophron. A notice of 

 Liophron and Centistes by Eeinhard, accompanied by 

 diagnoses of the species, is to be found in the Berl. ent. 

 Zeit. for 1862. Forster, in his Synopsis, created some 

 confusion by substituting the name Liophron for Hali- 

 day's Centistes, and quoting as a type L. ater, Nees, 

 which is Ancylus excrucians, Hal. ; the type should have 

 been L. ater, Wesm. As for Haliday's Liophro)i, or 

 Ancylus, it is divided by Forster into two new genera, 

 Ancylocentrus, containing (for the second time) Ancylus 

 excrucians, Hal., with the claws bifid; and Allurus, 

 containing Ancylus muricatus, Hal., with the claws 

 simple. The character taken from the claws is here 

 reversed in the two genera ; it is also a merely sexual 

 distinction. Another genus of Forster's, Syrrliizus, 

 remains undescribed. With the Liophronides termi- 

 nates the series of Polymorphous groups characterised 

 by 2 cubital areolets in conjunction with a sessile or 

 subsessile abdomen. The perfect insects frequent fungi, 

 but their habits in the larval state are entirely unknown. 



Mesotlioracic sutures distinct . . . , i. LioniRON. 



Mesutlioracic autuies obliterated . . . . ii. Ckntisxes. 



