_NEMOGNATHA. 379 
very sharply defined, for the rest coarsely and rather sparsely punctured; the outer spur of the hind 
tibie stouter than the inner one, spoon-shaped ; beneath with the ventral surface in the male dull, and 
densely and finely punctured, in the female shining and sparsely punctate ; sixth ventral segment in the 
male cleft down the middle, the fifth unimpressed. 
Var. a. Larger ; the elytra pale gréenish-yellow ; the legs, the tarsi and knees excepted, flavous. 
Length 7-12 millim. (¢ 9.) 
Hab. Mexico, Morelia (Leon 1), Chilpancingo (H. H. Smith), Etla, Tuxtla, Yucatan 
(Sallé), Temax in North Yucatan (Gaumer); GuatemaLa, San Gerénimo (Champion) ; 
Nicaragua, Chontales (Belt); Panama, near the city (Champion). 
Notwithstanding various discrepancies from the description (which is apparently 
based on a single specimen), I have very little doubt that I have correctly identified 
Dugés’ species. It is advisable, however, to give a renewed description from the large 
number of specimens received, the species being a very variable one. 
The species is common in Yucatan, but is apparently rare elsewhere. About three- 
fourths of the Yucatan examples, and the one from Chontales also, have a broad 
piceous or brownish vitta on each elytron; in the other examples the elytra, as stated in 
Dugés’ description, are entirely brownish-yellow. Of the var. « we have three specimens, 
one from Etla and a pair from San Gerénimo. Two examples—one from Chilpan- 
cingo and one from Panama—have the head and thorax more thickly punctured, but 
they are connected with the type by intermediate gradations. It is probable that our 
Yucatan specimens are somewhat discoloured and that the ground-colour of the elytra 
is pale greenish-yellow, as in var. « NV. tarasca is closely allied to WV. immaculata, 
Say, and has the thorax and elytra glabrous as in that species ; it differs from it, how- 
ever, by the three well-marked raised lines or coste of the elytra, the latter more 
closely and not so coarsely punctured. The thorax is very sparsely but quite distinctly 
punctured, instead of being almost impunctate as in NV. immaculata, and the head is 
more prolonged in front than in that species. NV. punctipennis, Lec., from Arizona, 
and WV. dunniana (Casey), from Texas, are also allied forms; the former has the head 
more prolonged in front*, and the latter has the elytra more coarsely and more sparsely 
punctured. Labelled V. marginata, Pilate, in the Sallé collection. 
11. Nemognatha zonitoides, (Tab. XVII. fig. 15.) 
Nemognatha zonitoides, Dugés, La Naturaleza, iii. p. 47, t. 2. figg. 1, la-h*; An. Mus. Michoa- 
cano, ii. p. 110 dis”. 
Hab: Mexico (coll. F. Bates), San Pedro, Parras, and Saltillo in Coahuila (Dr. Palmer), 
Monterey in Nuevo Leon, Villa Lerdo in Durango, Chilpancingo, Tonila in Colima 
(Hoge), Rincon in Guerrero (H. H. Smith), Guanajuato (Duges**, Sallé), Morelia 
(Dugés *), Temax in North Yucatan (Gaumer) ; GuaTEMALA, San Gerdnimo (Champion). 
A common and widely distributed species in the highlands of Mexico and Guatemala, 
* As I am informed by Dr. Horn, who has examined one of our Yucatan specimens. 
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