230 SUPPLEMENT. 
2(4). Derobrachus granulatus. | 
D. inequali simillimus, sed differt elytris passim granulato-punctulatis ; thorace fere levi lateribus utrinque 
quadrispinosis. 
Long. 1 in. 6 lin. Cg. 
Hab. Muxico, Guachinango (Sallé). One example. 
& 
The apical lateral spine of the thorax, which in D. sulcicornis and D. inequalis is 
sometimes subbifid (7. e. presents on its anterior side a short appendicular tooth), is here 
developed into two nearly equal spines. Notwithstanding this character and the 
granulate punctuation of the elytra, D. granulatus may probably prove, on the evidence 
of further examples, only an extreme variety of D. inequalis; and the smoother thorax 
points to the conclusion that all three (7. e. including D. sulcicornis) may be varieties 
of one and the same very variable species. 
2 (8). Derobrachus forreri. 
D. sulcicorni affinis, sed minus elongatus, elytrisque sicut in D. longicorni post humeros minus dilatatis. 
Elongato-oblongus, niger, elytris castaneo-fuscis ; antennis brevioribus, articulo 3° usque fere ad apicem, 
4°que breviter, sulcatis; thorace nitido vix punctulato, spinis lateralibus minus elongatis, prima bifida ; 
elytris perparum sulcatis fere levibus, basi vage punctulatis, humeris haud scabrosis. 
Long. 1 in. 8 lin..ad 1-10 lin. ¢. 
Hab. Mexico, Presidio (Forrer). Three examples. 
Agrees with D. longicornis in the form of the elytra, which, however, are relatively 
distinctly shorter ; in sculpture they differ from the allied species in wanting the 
rough punctuation of the shoulders. The antenne are short, scarcely three fourths 
the length of the elytra, and the fourth joint has a short sulcus. The thorax is nearly 
smooth, and the lateral spines are rather shorter than in D. sulcicornis, the apical one 
being in all three examples subbifid, 7.¢. bearing on its anterior side a short but 
acute appendicular spine. The eyes are approximated above nearly as in D. longicornis. 
One specimen with rather more elongate elytra has almost exactly the form and 
appearance of a male example of D. geminatus in my collection from Arizona. Such 
individuals may be readily distinguished from D. geminatus by the closer and stronger 
striation of the antennal joints. 
2(c). Derobrachus megacles. 
D. forrert affinis, sed differt elytris longissimis omnino punctato-coriaceis. Valde elongatus parallelogrammicus, 
niger ; elytris castaneo-fuscis, abdomine rufo-testaceo; oculis supra latioribus et extus minus convexis; 
thorace nitido vix punctulato, spinis modice elongatis, apicali bifida; elytris crebre confluenter punctatis 
vel punctato-coriaceis, obsolete bicostatis ; antennis quam corpus multo brevioribus, articulis 1°-2™ et 3° 
(breviter) sulcatis. 
Long. 2 in. 7 lin. (elytr. 1 in. 11 lin.). 
Hab. Mexico (Sallé). One example. 
The antenne are four fifths the length of the body. The species has a peculiar 
facies, owing to the relative great length and parallelogrammical form of the elytra. 
