LAMPYRIDAE. 183 



Sub-Family I.— LAMPYRIDAE (genuini). 



The head is usually immersed in the thorax, so as to conceal 

 the gular portion ; the antennae are generally closely approxi- 

 mate, and the labrum is nearly always quite distinct. The side 

 pieces of the metathorax are wide ; the epimera are large, and 

 the inner outline of the episterna is straight or slightly convex. 



Three tribes are represented in our fauna : — 



Antennae approximate ; 



Middle cox33 separate ; head uncovered. Ltcini. 



Middle coxae contiguous ; head covered by thorax. Lampyrini. 



Antennae distant ; head prominent. Phengodini. 



Tribe I.— MOWI. 



In this tribe we have species in which the sides of the thorax 

 are commonly foliaceous, but the head, though small, deeply im- 

 mersed in the thorax, and deflexed, is not covered by a prolonga- 

 tion of the thorax ; the antenna? are approximate, much compressed 

 and inserted upon the front, or at the base of a more or less dis- 

 tinct beak. The mandibles are small and simple ; the maxillary 

 palpi tolerably long and dilated. The side pieces of the meta- 

 thorax are very wide, and the inner margin is slightly curved. 

 The trochanters are situated entirely in the axis of the thighs, 

 and are generally longer than in the other sub-families. Our 

 species represent only one tribe, Lycini, distinguished by the 

 deflexed head, distinct labrum, and distant middle coxa?. 



Our genera are : — 



Antennae in front of the eyes, at the base of the beak; 



Head prolonged into a long beak. Ltcus. 



Head with a short broad beak. Dictyopterps. 



Antennae between the eyes ; 



Head with a very short beak ; (thorax carinate). Calopteron. 



Head without beak ; 



Antennae flabellate, thorax carinate. Caenia. 



Antennae serrate, thorax not carinate. Eros. 



Tribe II.— LAMPYRIXI. 



We here have species in which the head is deeply immersed in 

 the thorax, and protected by the hood-like thorax ; the antennae 

 are approximate and inserted upon the front ; the eyes usually 



