322 NITIDULID. 
The variation does not seem to depend altogether on locality, though it is decidedly 
different in Chiriqui from what it is in Mexico. Varieties occur so closely resembling 
L. simulatriz and L. cassidoides in colour, size, and form, that I am able to discriminate 
them only by the absence of certain points that I have considered characteristic of those 
species, and these varieties occur in the same localities as the species they resemble. 
Whether all the numerous forms I have referred to L. decumana really pertain to one 
species is still doubtful to me, though, as I have remarked above, I fail to find any 
satisfactory distinctive characters. Three South-American species described by Erichson 
as distinct are now united with Z. decumana in the Munich Catalogue. 
4, Lobiopa cassidoides, sp. n. 
Ovalis, convexa, subtiliter pubescens, parce setulosa, fusco-testacea, capite fusco; corporis limbo minus late 
explanato. 
Long. 4-5 millim. 
Hab. Guatemata, Cerro Zunil, Zapote (Champion); Panama, Volcan de Chiriqui 
between 4000 and 6000 feet (Champion). 
The punctuation of the upper surface is almost equally dense all over, and the 
punctures are not serially arranged even near the sides of the elytra; the sete are 
rather thick, regularly arranged. The punctuation of the under surface is quite fine 
and scanty. 
In this species there is a comparatively large lobe behind the eyes, on the under 
surface of the head: this renders the recognition of the species certain. Moreover, 
the mentum and the parts of the head behind it bear some fine, suberect, silky 
pubescence; and the front tarsi are more dilated than in ZL. simulatrix. I have not 
observed a similar pubescence on the underside of the head in any other species of ~ 
Lobiopa ; but it is not very conspicuous, and to be sure of its existence and nature must 
be looked at laterally. 
This species is also a variable one. A considerable series received from Chiriqui do 
not vary much, except in size, and these I have treated as the typical form. One 
example from Cerro Zunil and two from Zapote agree fairly well with this typical form ; 
but the other examples from these two localities are very decidedly different, the form 
being more convex, and the punctuation rather coarser and more distant, and each 
elytron bearing a large blackish basal mark extending backwards for about half its 
length. 
5. Lobiopa simulatrix, sp.n. (Tab. X. fig. 17, ¢.) 
Parva, ovalis, sat convexa, testacea, minus picturata fere unicolor, fortiter punctata; elytris seriatim parce 
setosis, lateribus anguste explanatis. 
Long. 4-43 millim. 
Hab. Mexico, Colima city, Jalapa (Hége); GuatemaLa, Teleman (Champion); Nica- 
raGua, Chontales (Janson); Panama, Volcan de Chiriqui (Champion). 
