MELANDUYIDAE. 399 



variable in size, but very large and serrate in Orchesia; tarsi 

 lilifDrm; claws siiui)le. 



The follcnviiig genera occur in our fauna: — 



Sijurs of hind tibise large, the inner one very long, serrate. 2. 



Spurs of liind tibiie small ; hind coxae not oblique. Eustrophus. 



Spurs of hind tibiae moderate; hind coxae oblique. Hallomenus. 



2. Second antennal joint moderate. Orchesia. 



Second antennal joint thick ; antennae strongly clavate. 



Microscapha. 



The first two genera are represented on both sides of the con- 

 tinent; the other two only in the Atlantic region. 



Tribe III.— SCRAPTIIXI. 



Head inclined ; suddenl}^ constricted a short distance behind 

 the e3^es into a small neck; maxillary and labial palpi with the 

 last joint securiform ; anterior coxaj large, conical, contiguous, 

 with distinct trochaiitin ; middle coxa; absolutely contiguous ; 

 tibial spurs slender; tarsi with the penultimate joint lobed; claws 

 simple. 



Our genera are three : — 



Last joint of maxillary palpi triangular ; 



Penultimate joint of all the tarsi lobed. Scraptia. 



Penultimate joint of hind tarsi not lobed. Allopoda. 



Last joint of maxillary paljii elongate, cultriform. Canifa. 



No species has been described from the Pacific region, although 

 one is known to us. 



Tribe IV.— STEIVOTRACHELI^'I. 



Head horizontal or deflexed ; antenna? nearly filiform; maxil- 

 lary palpi with the last joint large, securiform ; anterior cox£e 

 conical, contiguous, with distinct trocliant in ; middle coxie abso- 

 lutely contiguous, til)ial spurs slender; tarsi filiform; claws cleft 

 to the base, with tiie inferior portion as long as, but more slender 

 than the upper. 



Two genera form this tribe: — 



Head horizontal, distinctly narrowed at a distance behind the eyes form- 

 ing a neck; first joint of intermediate tarsi longer than the fifth. 



Stenotrachelus, 



Head dcllexed, not narrowed behind ; first joint of intermediate t;nsi ('(jual 

 to the fifth. Scotodes. 



