- TRIARIUS.—MALACOSOMA. 335 
TRIARIUS (p. 571). 
1. Triarius lividus. 
Phyllobrotica livida, Lec. Trans. Am. Ent. Soe. xii. p. 28 (1885) °. 
Triarius mexicanus, huj. op. p. 571 (1887). | 
Dr. Horn has kindly given me a specimen of Phyllobrotica livida, Lec., and it proves 
to belong to the species described by myself under the name of Triarius mexicanus. ‘The 
insect is incorrectly referred to Phyllobrotica by Leconte, the tibiz being mucronate 
and the claws bifid. 
NEOBROTICA (p. 571). 
22. Neobrotica pallida. 
Pale fulvous, the antenna, tibie, and tarsi black; thorax with a deep transverse depression, impunctate ; 
elytra pale fulvous, impunctate. 
Length 2 lines. 
Head impunctate, the frontal elevations indistinct ; eyes large and convex, occupying almost the entire side of 
the head; antennsz elongate, extending beyond the middle of the elytra, black (the apical two joints 
wanting), the second joint very short, the fourth longer than the third; thorax subquadrate, about one- 
half broader than long, slightly narrowed towards the base, impunctate, the disc with a deep, somewhat 
curved, broad depression ; elytra with a deep post-basal depression and the suture depressed below the 
scutellum, entirely impunctate ; below and the femora fulvous, the apical portion of the femora above and 
the tibise and tarsi black; the first joint of the posterior tarsi longer than the following three joints 
together ; claws appendiculate. 
Hab. Mexico, Panistlahuaca (Sallé). Two specimens. 
23. Neobrotica ruatanez. (Tab. XLIII. fig. 17.) 
Fulvous, the antennz (the lower two joints excepted) black; thorax obsoletely impressed, impunctate; elytra 
extremely minutely punctured, fulvous, the suture broadly, and the posterior portion black. 
Length 2 lines. 
Head impunctate, flat, without any elevations ; antennew black, the lower two joints fulvous, the fourth longer 
than the preceding two joints together; thorax scarcely broader than long, slightly constricted at the 
base, the surface impunctate, with two shallow but large depressions; scutellum fulvous; elytra scarcely 
perceptibly punctured in irregular rows, with a distinct flattened margin, fulvous, a sutural stripe, 
widening anteriorly, and the posterior portion (the lateral margin excepted) violaceous-black ; legs fulvous ; 
the first joint of the posterior tarsi as long as the following three joints together ; claws appendiculate. 
Hab. Honpuras, Ruatan Island (Gaumer). 
The system of coloration in this species is very different from that of the other 
members of the genus. Four specimens. - 
24. Neobrotica sexplagiata. 
Diabrotica sexplagiata, huj. op. p. 558, Tab. XXXTI. figg. 14, 15. 
Diabrotica bivittaticollis, Baly, Journ. Linn. Soc., Zool. xix. p. 257. 
Lyi ST ACOSOMA (p. 580). 
M. Allard, Compt. Rend. Soc. Ent. Belg. 1889, p. Ixvii, gives Mexico as a locality 
for M. narense, Har.; it is probable, however, that this determination is incorrect. 
