324 LAMELLICOENIA. 



23 to 33 millimetres. The following is a doubtful variety, occurring in the same 

 localities as the type form : — 



Tar. X. ensifer, Sturm, MS. Thoracis lobus brevis, latus, obtusus, medio canaliculars ; elytra lsevia, stria 

 suturali punctulata subobsoleta. (Figg. 5, 5 a.) 



Eab. Mexico (Sturm, in coll. Salle), Jalapa (Edge), Chiapas (Salle). 



We figure a typical well-developed male from Jalapa and a male of the var. ensifer 

 from Mexico (coll. Sturm). 



4. Xyloryctes furcatus. (Tab. XIX. figg. 1, 1 a, 2, 2 a, 6 .) 



Xyloryctes furcatus, Burm. Handb. der Ent. v. p. 209 \ 



Eab. Mexico 1 , Cordova (Salle), Mexico city, Jalapa (Edge); Guatemala (Salle), 

 Coban and Tactic in Vera Paz (Conradt). 



Distinguished in the male (in well-developed individuals) by the narrow, long, 

 obliquely elevated and bifid thoracic lobe ; and from X. telephus in both sexes by the 

 well-marked and punctulated sutural stria. The sides of the thorax in the male are 

 more strongly explanate-reflexed than in the same sex of X. telephus, but some 

 examples of the latter approach X. furcatus in this respect. The pygidium in the 

 male is more closely punctulated. We figure a well-developed male example from 

 Cordova, and a male minor from Jalapa. 



5. Xyloryctes corniger. 



Eab. Mexico (Sturm, in coll. Salle); Panama, Volcan de Chiriqui 3000 feet 

 (Champion). 



A single male example, labelled X. corniger, Sturm, resembles X. telephus, var. ensifer, 

 but has a well-impressed sutural stria and the thoracic lobe somewhat different, the 

 latter being much broader and not canaliculated. It is a well-developed male 

 (32 millim. long), and has an almost perfectly straight cephalic horn flattened ante- 

 riorly. Two examples, males of minor development, from Chiriqui, agree with Sturm's 

 specimen in thoracic structure, and have cephalic horns very broad at the base, but 

 small and acute-triangular in shape. 



6. Xyloryctes teuthras. (Tab. XIX. figg. 3, 3 a, s .) 



cf minor. Breviter oblongus, castaneus, capitis cornu brevissimo basi lata apice acuto ; thorace fere sicut in 

 X. satyro antice oblique truncato-declivi, margine superiore medio minime vel haud producto; elytris 

 obsoletissime striatis, stria suturali punctulato impresso, versus apicem profunde insculpta; pygidio 

 passim punctulato punctis majoribus intermixtis. 



Long. 24 millim. 



Eab. Guatemala (Salle), Aceytuno 5100 feet (Salvin). 



Two examples only ; of similar development to the two males of X. corniger from 



