DAIPHRON. 67 
commencement of the black part, from which point they are rounded to the suture. 
About one third of the elytron at the apex is black ; but this is subject to variation, the 
Cubilguitz specimen having less black, and the division between this and the ochreous 
part not so sharply defined. 
The structure of the apical segment in the male is similar to that of Chauliognathus ; 
the seventh segment forms a convex valve-like clasper, the pygidial plate being’ laterally 
compressed. The colour of the ventral plate affords good specific distinctions. The female 
has the sixth plate wide, with its apical margin sinuous and acutely excised in the middle, 
a small seventh segment being also present. Four specimens are all that I have seen. 
2. Daiphron ochraceum. 
Ochraceum vel ferrugineum ; macula occipitali, antennis, palpis, tibiis et tarsis, scutello, abdominis lateribus et 
apice nigris, femoribus apice infuscatis. Long. 17-20 millim. ¢ Q. 
Hab. GuateMALa, Cubilguitz, San Juan, Teleman, Senahu (Champion). 
Of the same size and similar in form to D. lyciforme. The antenne are in the male 
almost equal to the body in length. The thorax has no vitta; but a small double fossa 
in front of the scutellum is infuscate. Both the front and basal margin both in this 
species and in D. lyciforme are sinuous and faintly emarginate in the centre. 
3. Daiphron crassicorne. (Tab. V. fig. 24.) 
Nigrum ; prothoracis lateribus, elytrorum basi et capite ante antennas rufis; antennis latis, ad apicem attenuatis, 
serratis. Long. 10 millim. 9°. 
Var. Pedibus basi, pectore, capite et prothorace rufis, hoc antice nigro-notato. Long. 9 millim. ¢. 
Hab. Guatemata, Zapote (Champion). 
The male is the paler of two specimens taken by Mr. Champion, the one shown in 
our Plate being the female. In the former the head is entirely yellow beneath, the 
crown infuscate; the thorax is subquadrate, a little narrowed in front, with a shallow 
wide impression near the base, which is pale fuscous, and a dark spot near the front 
margin. The elytra widen from the base to the apex, the black portion occupying half 
their length in the male and rather more in the female; in the latter the suture and 
scutellum are fuscous. The edge of the black is indented in both specimens. The 
antenne are formed as in other species of this genus, but are wider, and their middle 
joints are more triangular than in any; the third joint is very much smaller than the 
fourth, not being half as long and much less expanded ; joints 4-8 are wide, somewhat 
cup-shaped; joints 9, 10, and 11 gradually decreasing in width. ‘The legs in the male 
are yellow below the apices of the femora; in the female they are quite black. 
A species of Longicorn of Mr. Bates’s genus Tethlimmena so precisely resembles this 
insect as readily to escape detection, both the colour, size, and general form (including 
that of the antennze) being similar; even the projecting point on the edge of the black 
apical part is the same in each. They were not, however, taken in company. 
K 2 
