6 PROC. ENT. SOC. WASH., VOL. 22, NO. I, JAN., 1920 



entirely distinct; antennae short, two-jointed with supplementary joint; 

 (basal joint possibly retracted); no ocelli; mandible obtusely bidentate, cut- 

 ting edge bearing two obtuse teeth, but molar part less pronounced than 

 in Aulonium; ventral mouth parts less deeply retracted than Aulonium, 

 cardo more perpendicular and oval, mentum and stipes more heavily chit- 

 inized; lacinia cylindrical; only last joint of labial palpi distinct, this cyl- 

 indrical. 



Legs more robust and shorter than in Aulonium, hairs short, setose. 

 Thoracic and abdominal terga entire; ninth segment relatively short, bear- 

 ing two long recurved chitinous cerci with no pit or carina between; tenth 

 wart-like, ventral. Spiracles annular-bifore, the spiracular tubes very small. 



Pupa. Form more slender than in Aulonium, protergum about twice as 

 long as wide, anterior and lateral margin bearing setigerous papillae; scu- 

 tellum less pronounced; lateral margins of terga bearing two setose papillae, 

 epipleurum one; last segment having two widely separated, acute, erect, 

 chitinous points. 



Described from specimens in the U. S. Nat. Museum, labeled 

 2197, Ft. Capron, Florida. These were collected by H. G. 

 Hubbard. 



Monoedus Lee. 



Larva. Form and general character similar to Aulonium from which it 

 differs in lacking the heavy chitinization of the cereal plate and the cerci 

 are less strongly recurved. A very faint carina extends across the anterior 

 margin of the mesothorax and metathorax. Tip of lacinia rounded, not 

 beaked, inner apex bearing curved spines, last joint of maxillary palpus 

 cylindrical, obtuse, scarcely longer than second; anterior margin of clypeus 

 regularly curved; last joint of antennae cylindrical, slightly longer than 

 penultimate; molar surface of mandible beset with much coarser teeth. 



Described from a single specimen in the U. S. N. Museum 

 Collection. This larva was not reared but collected in the pith 

 of stems of Metostelma on the branches of which the adults were 

 very abundant. Homestead, Fla., February 24, 1919. H. S. 

 Barber. 



If this larva is properly associated with Monoedus the genus 

 should certainly be placed in the Colydiidae. 



Bothrideridae. 



In the family Bothrideridae the larvae of Bothridcrcs, Dere- 

 taphrus and Lithophanus have been studied. They may be 

 characterized as follows: 



White, fleshy, fusiform, having very thin integument; legs short, rive- 

 jointed, coxae very widely separated, tarsi claw-like (no tarsal claws) ; head 



