INTRODUCTION. 



b*. Tarsi all three-jointed or 

 apparently three-jointed. 

 a%. Elytra entire, covering 

 the abdomen ; ventral 

 segments of abdomen 

 nearly equal in length. . 

 b\. Elytra truncate, leaving 

 the apex of the abdomen 

 uncovered ; first and 

 fifth ventral segments 

 longer than the others. . 

 c\. Tarsi four-jointed, or with 

 the front tarsi of the male 

 three-jointed (very rarely 

 all three-jointed), 

 a J. Tarsi in male with 3-4-4 

 joints respectively, in 

 female with 4-4-4j oints. 

 b\. Tarsi nearly always four- 

 jointed in both sexes, 

 with the third joint 

 normal and free ; abdo- 

 men with five ventral 

 segments of which the 

 first three or four are 

 more or less connate . . 

 c£. Tarsi nearly always 

 pseudo-trimerous, four- 

 jointed, with the third 

 joint usually very small, 

 hidden in the emargi- 

 nation of the third ; ab- 

 domen with five free 

 ventral segments. 

 * Epimeraofmesosternum 

 obliquely quadrilate- 

 ral ; antennas Inserted 

 between the eyes ; 

 anterior coxal cavities 

 either closed or open 

 behind ; tarsal claws 



simple 



** Epimeraofmesosternum 

 irregularly triangular, 

 with the apex directed 

 to the front ; antennae 

 as a rule inserted at 

 the inner front margin 

 of the eyes ; anterior 

 coxal cavities nearly 

 always closed behind; 

 claws, as a rule,appen- 

 diculate or toothed . . 



Lathridiidae, p. 113. 



Monotomidae, p. 107. 



Mycetophagidae, p. 114. 



Colydiidae, p. 115. 



Endomychidae, p. 117. 



Coccinellidae, p. 119. 



