14 LONGICORNIA. © 
XENAMBYX. 
Prionidis (gen. Macrotoma, Aplagiognathus) quoad formam similis, sed generibus Diploschemati et affinibus certe 
affinis. Elongatus, robustus, fere cylindricus. Caput antice breve ; frons lata, concava ; labrum exsertum 5 
mandibule breves late, edentate ; palpi breves, articulis terminalibus majoribus, cupuliformibus ; oculi 
distantes, magni, grosse granulati, fortiter emarginati; tubera antennifera magna, obliqua; antenne 
(2?) breves, thoracis basin paullo superantes, scapo gradatim incrassato, articulis 3°-10™ serratis, 11° appen- 
diculato, 4°-11™ intus fovea elongata porifera; thorax fere orbiculatus inermis ; elytra paralella, apice lata, 
subtruncata, ad suturam spinosa ; prosternum absque processu inter coxas, his contiguis oblique exsertis, 
acetabulis extus paullo elongatis ; mesosternum inter coxas angustissimum, acetabulis extus late apertis ; 
metasternum elongatum; episternum latum, postice sensim angustatum apice acuto ; abdomen segmentis 
gequalibus, ultimo (dorsali et ventrali) latissimo; pedes minus elongati, simplices, tibiis apice extus haud 
spinosis; tarsi articulo primo triangulari, haud elongato, tertio bilobo, plantis dense equaliter velutinis. 
In general form the insect for which this genus is proposed resembles so strongly a 
Prionid of the genera allied to Macrotoma that it would be certainly placed among them 
if attention were not given to its essential characters; the most decisive of which are 
_ the simple rounded sides of the thorax and the relative shortness of the sockets of the 
haunches of the anterior legs. The distinctly articulated labrum is a further point of 
distinction from the Prionide. From the genera to which it is nearest allied (Spatho- 
pygus, Diploschema, &c.) it is distinguished by the absence of prosternal process and the 
exserted fore coxe. | 
1. Xenambyx laticauda. 
Fusco-castaneus, capite, antennis thoraceque supra nigris, pedibus rufescentibus ; capite, mandibulis basi 
antennarumque scapo crebré punctatis, breviter sparsim fulvo-pilosis; thorace disco discrete, lateribus 
subrugose, grosse punctato, parte discoidali a lateribus linea abbreviata indistincta separata, linea autem 
abbreviata dorsali prope basin impressa; elytris passim haud crebre punctatis vage longitudinaliter 
sulcatis. 
Long. 1 poll, 7 lin. 9? 
Hab. GuateMaLa (from W. W. Saunders’s collection). 
The unique specimen is probably a female, judging from the shortness of the antennee 
and the slenderness of the legs; the apical segment of the abdomen, however, is of the 
form we usually find distinctive of the male, the plates, both ventral and dorsal, being 
sinuated in the middle. The pubescence of the head, thorax, and antenne is erect and 
not so close as to obscure the slight gloss of the integument. The antenne are punc- 
tured throughout, the scape only densely. The elytra are of a light tawny-brown colour, 
darker and castaneous towards the base. 
SPONDYLIS. 
Spondylis, Fabr. Syst. Entom. i. 2, p. 358. 
Three species of this aberrant genus of Cerambycide have been described from north 
temperate parts of Europe, Asia, and North America. They live in the wood of pine 
trees. 
