OOCCINELLIDAE. 115 



Group I. — Hippodamiae. 



These species are less specialized in structure than the other 

 represeutatives of the famil}^ but do not thereby evidence affinities 

 except to the other groups. They are easily recognized by the 

 more elongate and loosely formed body, and by the usual absence 

 of the rnesosternal and ventral lines, though the former are present 

 in Aniaosticta, and the latter in Adonia : but never are both 

 apparent. The legs are therefore longer, more slender, and less 

 retractile than in the following groups: the antennte are very- 

 short. The genera may be thus arranged : — 



Claws simple. 2. 



Claws appeiidiculate. 3. 



Claws bifid. 4. 



2. Sternal lines distinct, hind angles of prothorax obtuse. Anisosticta. 

 Both lines absent ; hind angles of prothorax rounded. Naemia. 



3. Third anteunal joint slender. Megilla. 

 Third antenna! joint dilated, triangular. Ceratomegilla. 



4. Sternal and ventral lines absent. 5. 

 Ventral lines distinct. Adonia. 



.5. Base of protliora.v sinuate. XSriopis. 



Base of i^rothorax rounded. Hippodamia. 



Group II. — Coccinellce. 



The species of this group are usually rounded, though some- 

 times oblong as in the preceding group: but in such instances 

 they are readily recognized by the well-defined coxal lines of the 

 metasternuni and first ventral. Suppressing the genera of feeble 

 characters, tliey may be divided as follows: — 



Antennae short, scarcely longer than the head, epipleune not extending 

 to the sutural tip. 2. 



Antennas long, extending to the middle of the prothorax ; epipleurae ex- 

 tending to the sutnral tij); first ventral lines obliterated externally. 3. 



2. First ventral lines angulate externally. Coccinella. 

 First ventral lines semicircular complete. Adalia. 

 First ventral lin«'S inciunplete externally, antennns loiig<!r. 



Anisocalvia. 



3. Last joint of antennw truncate. 4. 

 Last joint of antennas rounded. .'>. 



4. Prosternuni compressed in front; claws bifid. Myzia. 

 Presternum not compressed in front; claws toothed. Anatis. 



.'i. Body small, pale, with numerous dark .spots. Psyllobora. 



