INTRODUCTION, | KXV 
American genera of Meloide are altogether absent from the Central-American fauna, 
the more. temperate northern regions furnishing a greater diversity of generic types. 
The Mexican species have been twice monographed by Dr. E. Dugés, but this author 
appears to have been entirely unacquainted with many of the Mexican forms. One 
genus (Leonia) is known only as yet from Mexico; this, however, is a very close ally of 
the North-American Hornia. Seven genera are common to North, Central, and South 
America, and eight to North and Central America. 
From the foregoing summary it will be seen—(1) that the Mexican and Central- 
American Heteromerous fauna, except as regards those genera containing apterous 
species living upon the ground (Asida, Elwodes, Argoporis, &c.) and some winged 
Cistelidee (Hymenorus &c.), has little to do with that of temperate North America ; 
(2) that a considerable number of genera are endemic in Mexico; (3) that the fauna of 
Central America south of Mexico partakes largely of that of Tropical South America. 
These conclusions nearly coincide with Mr. Bates’s remarks, ‘ Biologia Centrali- 
Americana,’ Coleoptera, V. p. v, on the geographical distribution of the Longicornia 
of the same region. To further illustrate the distribution of the Heteromerous 
genera known only as yet from within the limits of Mexico and Central America, the 
following ‘Table’ is added :-— 
. Of wider 
Mexico. mis Guatemala Nicaragua. | Costa Rica, | Panama. distribution Total. 
America. 
Tenebrionide ...... 17 1 2 1 2 3 15 41 
Cistelide.......... 7 wees 2 Laas Len 1 3 13 
Othniide.......... Lea cee Lee Lea wees Lees 
Nilionide ........ see seca 
Monommide ...... Lea Leas 
Lagriide .......... Lees 2 1 3 
Melandryide ...... 2 eae eae 1 4 7 
Pythide .......... Lee wees 1 Lee 2 3 
(Edemeride ...... wee vee sae Lee 4 4 
Xylophilide ...... 1 1 
Anthicide ........ wee wees Lee see wee Leese wees vee 
Mordellide ........ 1 Lea vee sees seas teas 1 2 
Rhipidophoride ....|  .... wees wees wees eae oes whee esas 
Meloide .......... 1 Leese Lees Lease eee Lee wee 1 
29 1 5 ‘1 2 7 30 75 
The material examined consists chiefly of the extensive Mexican collections of 
M. A. Sallé and Herr Hoge, and the large number of specimens obtained by myself 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, March 1893. a 
