INTKODTTCTION. 



vn 



Of the totally insufficient diagnoses, often of three or four lines, of various authors, 

 it is not necessary to speak here. 



The total number of 2166 species belong to 199 genera, and are apportioned 

 thus : — 



Mexico and Central America. 



Sagridae 



Donaciidae 



Crioceridae 



Megalopodidae 



Clythridse , 



Cryptocephalidae 



Chlamydidae 



Lamprosomid® 



Eumolpidae 



Chrysomelidse . . 



Galerucidael?^ 011 ! 86 -- 

 [ baler ucmae 



Number 



of 

 genera. 



2 

 2 

 3 

 3 



12 



5 



4 



2 



39 



13 



77 



37 



New- 

 genera 

 described. 



Number 



of 

 species. 



199 



21 

 17 



43 



12 



2 



168 



42 



84 



181 



77 



64 



299 



219 



628 



390 



New 



species 



described. 



2166 



8 



9i 



17 

 37 



103 

 39 

 39 



205 

 66 



466 



292 



Distribution of the genera 

 beyond our limits. 



America 

 north of 

 Mexico. 



1363 



2 

 2 

 2 



*8 

 4 

 3 

 1 



12 

 7 



20 

 9 



South 

 America. 



Old 

 World. 



70 



3 

 3 



12 



5 



3 



1 



29 



13 



50 



11 



130 



1 

 2 



2 



3 

 3 



2 

 2 

 6 

 3 

 13 

 7 



44 



From these figures it will be seen that nearly half the total number of species, and 

 more than half of the genera, belong to the Galerucidse. Of the 199 genera, 70 are 

 represented in America north of Mexico, 130 in South America, and 44 in the Old 

 World. The Eumolpidae furnish 39 genera, 27 of which do not reach the United 

 States. The 13 genera' of Chrysomelidse are all represented in South America, 7 in 

 America north of Mexico, and but 3 only in the Old World. The Halticinee belono- 

 to 77 genera, of which, so far as at present known, 22 are peculiar to Central America; 

 20 are represented in North, 50 in South America, and 13 in the Old World. The 

 Galerucinse, with 37 genera, have 18 peculiar to Central America; 9 are represented 

 in North, 11 in South America, and 7 in the Old World. The genera containing the 

 greatest number of species are: — Diabrotica 178 (116 new), Lema 129 (73 new), 

 (Edionychis 75 (44 new), Cryptocephalus 72 (43 new), Chlamys 69 (37 new), Lampro- 

 soma 62 (37 new), Pachybrachys 50 (28 new), Lactica 43 (35 new), 8ystenaS8(32 new), 

 Mda 38 (30 new), JDisonycha 36 (25 new), Scolochrus 33 (17 new), Mastostethus 31 

 (13 new), Haltica 31 (19 new), Epitrix 31 (21 new), and Aphthona 31 (27 new). Of 

 20 consecutive Halticid genera, Allochroma to Hylodromus inclusive, only one {Hypo- 

 lampsis) reaches the United States. Of the 2166 species described or enumerated 



