44 ANNULOSA JAVANICA. 



is not as with Dacne and Languria the fourth but the first. Languria and the insects imme- 

 diately allied to it differ from the typical characters which I have ventured to attribute to the 

 aberrant groupe of Necrophaga, inasmuch as the clava of their antennae is often composed of 

 more than three joints and sometimes even of five. Helota, however, as before said, has its 

 antennae and mouth similarly constructed with those of the more typical insects of the stirps or 

 at least with Dame, to which it is much nearer allied than to Engis. 



The dorsal process of the maxilla is also in this genus beautifully distinct, and even presents 

 a trace of being articulated. This circumstance of itself as well as the number of joints in the 

 palpi separates Helota from the Rupreslida;, and places it in this family, for although other 

 families in other tribes, as I have before shewn, may analogically present the bilobed maxilla, 

 and thus approach to the typical structure of that organ, the pieces of the maxilla in all the 

 Buprestidas, which I have dissected, are confluent and indeed present a very uniform cha- 

 racter wholly different from that of our insect. Moreover the typical character of the maxillary 

 palpi in Coleoptera is that they are quadri-articulate, but in the Necrophaga generally as well as 

 in our insect, the first joint is evanescent, so that such palpi may be described as tri-articulate 

 in which respect they differ wholly from those of the Buprestidce. 



Genus LANGURIA. Lat. 

 This genus was established by M. Latrcille on the examination of an insect, L. bicolor, which 

 was brought from North America by M. Bosc. The genus, however, has not been hitherto pro- 

 perly characterized, since under a high lens it appears to be truly pentamerous, the penultimate 

 joint of the tarsi being very minute, as in Engis. The validity of M. Latreille's generic character 

 will, therefore, depend on his description of the clava of the antenna?, which lie considers as con- 

 sisting of five articulations — a description which, if true, will exclude all the following Javanese 

 species from the genus. The fact seems to be, that Languria is divisible into several subgenera, 

 which may be made to depend on the form of the antennae. Thus from the West Indies and 

 Brazil, M'e have Langurice with short antennae, and a very thick clava composed of five joints ; 

 while from the continent of India, we have such species as Languria elongata Lat. {Trososita 

 elongata Fab.), which have long filiform antennae, with a very indistinct attenuated clava, con- 

 sisting of three joints. The form of L. bicolor Lat. seems common to Asia and America. 

 Nevertheless as my object is not to make new genera, but to render new species sufficiently 

 known, I shall leave the following species in the genus Lang-uria, of which I reckon the prin- 

 cipal characters to be its linear body, clavate antennae, filiform maxillary palpi, and evanescent 

 fourth joint of the tarsus. 



87. Pyramidata. L. nifa thoracis punctis tribus nigris, capite elytrisque viridi-ceneis, antennh chatubeis 

 Jemoribusque testaceis. 



Long. corp. f 

 Caput supra viridiseneum subtus nigrum, antennis chalybeis : clava quadriarticulata. Thorax rufus mar- 

 gine antico et postico, puncto medio, alioque utrinque laterali nigris. Scutellum nigrum. Eh/tra 

 pyramidata viridiaenea nitida ,striis punctorum impressa. Abdomen sublineare pyramidatum vel 

 apicem versus gradatim attenuatum, subtus eonvexum rufum ; ano viridireneo. Pedes chalybei coxis 

 nigris, femoribusque, geniculis exceptis, rufis. 



Obs. A 



