CARABIDAE. 9 



with the inner spur above the apex ; anterior tarsi of the male with 

 two joints moderately dilated. 



By this group is made a transition to the following family, Am- 

 phizoidas. 



Tribe V.— C ARABIA I. 



A numerous tribe, containing some of the largest and most 

 beautiful species of the family, and also some very small ones; 

 they agree in habits, being found in shady situations in forests, 

 under stones and pieces of wood, or under leaves. They also agree 

 in the following characters: — 



The prosternum and prothoracic side pieces do not entirely sur- 

 round the anterior coxse, whereby the latter are in part protected 

 by concavities of the mesosternum, which is carinate at the middle 

 anteriorly, and frequently concave beneath; the prosternum (ex- 

 cept in Cychrus) is more or less produced behind the coxae, so as 

 sometimes almost to cover the mesosternum ; the anterior tibiae 

 are somewhat grooved internally at the apex ; the spurs are either 

 both terminal, or, from the apex being obliquely truncate, the 

 inner one is above the apex. 



The characters in this group are otherwise quite variable ; the 

 labrum is emarginate, toothed, or even deeply bilobed; the man- 

 dibles are sometimes toothed, sometimes simple, in Cychrus more 

 elongate than usual; the niaxillas of the same genus are also 

 much prolonged; the palpi are sometimes very much dilated; the 

 mentum is deeply emarginate, with the gular suture distinct. The 

 clypeo-frontal suture is straight, and usually distinct, but is want- 

 ing in the European genus Procerus. The antennas have usually 

 four basal smooth joints, but in Nomaretus there are only two. 



The outer joints are usually entirely pubescent, but in certain 

 species of Calosoma are so only at the margins. 



The sutures of the under surface of the prothorax are distinct, 

 the epimera project along the posterior part of the coxas, but do 

 not reach the prosternum ; the coxal cavity is thus open for a 

 greater or less extent at the hinder part. I cannot agree with 

 Schaum* that this is owing to a simple depression of this hind 

 margin ; and, moreover, the fact that it accompanies the carinate 

 mesosternum is sufficient to mark it as a natural character, even 



* Ins. Deutschl., I. 60. 



