380 LAMELLICOENIA. 



Var. T. intermedins. Magis elongatus, capite toto crebre punctato-ruguloso ; thorace paullo longiore, ante 

 medium dilatato, postice sinuatim angustato, angulis posticis rectis vel paullulum obtusis, longiore (apice 

 acutiore), triangulo sat profunde impresso ; elytris linea nigra curvata ab macula postbumerali usque ad 

 suturam biflexuose extensa (suturum interdum baud attingente), a linea longitudinali disjuncta. 



c? . Venter et metatborax medio albo-villosi ; tibiae anticee dente 3° obtuao. 



Long. 9 millim. tf $ . 



Eab. Mexico, Yolos, Chiapas {Salle). Five examples. 



An example of Sturm's in the Salle collection, differing only in the irregular thick- 

 ness of the flexuous subbasal fascia of the elytra, is labelled (in Sturm's handwriting) 

 T. deltoides, Newm. 



5. Trigonopeltastes sallaei. (Tab. xxm. figg. 15; 16, 18, vars.) 



T. geometrico proxime affinis; major; tborace longiore, medio multo obtusius dilatato, postea recte angustato, 

 angulis posticis obtusis (rarissime acutis), triangulo flavo longiore, basi plerumque utrinque abbreviata ; 

 elytris sicut in T. geometrico, sed macula communi magna transversa post scutellum, interdum maculam 

 bumeralem attingente sed haud per lineam flexuosam connexa, linea longitudinali ab apice obliqua antice 

 abbreviata. 



Long. 9-10 millim. <$ $ . 



Eab. Mexico, Tehuantepec (Sumichrast, in coll. Salle), Almolonga, Jalapa (Edge), 

 Temax in North Yucatan (Gaumer); Nicaragua, Chontales (Belt). 



Variat : — 1. Elytris maculis nigris, humerali et suturali deficientibus : Cbontales. 2. Elytris maculis nigris 

 omnino obsoletis : Yucatan. 3. Tborax postice magis angustatus, angulis posticis subacutis : Yucatan, 

 Cbontales. 



A large series of this insect was obtained by Herr Hoge at Almolonga, offering 

 scarcely any variation, and giving the impression of a species very distinct from the 

 series of T. geometricus from Cordova, which is also found at Almolonga. The 

 differences between the two forms are, however, to a great extent bridged over by the 

 var. intermedins described above, and slighter individual variations. The Tehuantepec 

 examples bear the MS. name of T. elongatulus in the Salle collection. The following 

 variety is somewhat more distinct : — 



Var. T. frontalis. Thorax sicut in T. sailed postice recte angustatus angulisque posticis obtusis ; niger, fronte 

 cum clypei basi fulvo-villosa ; tborace triangulo minus elongato, parum sulcato; elytris fulvis, linea 

 curvata subbasali abbreviata vel interrupts, linea recta longitudinali a medio usque ad apicem maculaque 

 ovata submarginali (lineola transversali alba includente) fusco-nigris ; pygidio albo-tomentoso, ( 6 ) medio 

 vitta, ( $ ) macula latiore, nigra, glabra, basi baud attingente ; pedibus antennisque fulvis. 3 . Venter 

 sternaque toto albido-tomentosi ; tibiae anticae bidentatse. $. Venter medio anguste segmentorumque 

 marginibus solum glabratis. 

 Long. 9| millim. 



Eab. Mexico, Playa Vicente (Salle). Two examples. 



The Mexican species of the genus evidently tend to form local varieties, and many 

 more no doubt remain to be discovered. 



