COLEOPTERA — CHRYSOMALINA. 225 



oblique or horizontal first joint of hind, tarsi without brush. Desmocerus 

 and Necydalus: mandibles not fringed, the latter with elytra very short. 

 Strangalia: last ventral segment of male deeply excavated 



Phymatodes: front coxae transverse, prothorax not margined. Asemum, 

 Tetropium, Opsimus and Dicentrus: ligula horny, the last two with prothorax 

 emarginate, the second with four eyes, the third with femora clavate. Xylo- 

 crinus: mesonotum punctured and pubescent. Callidium: mesonotum pol- 

 ished with scattered punctures. Hylotrupes: presternum broad. 



Acmaeops: front coxae conical, eyes not enveloping base of antennas, front 

 oblique or horizontal. Rhagium: presternum prominent between the coxae. 

 Centrodera: eyes coarsely granulated. Toxotus: tibial spurs not terminal. 

 Pachyta and Anthophylax: prothorax acutely armed on sides, the latter 

 strongly emarginate. 



Crossidius: scutellum acutely triangular. Stenosphenus: front coxalcav- 

 ities open. Dendrobius, Tragidion, Metaleptus, Purpuricenus, Ammanus and 

 Eatyle: mandibles not emarginate at tip, the first with prosternum broadly 

 lobed at base,, the last two with front short, the third with pubescence con- 

 colorous with punctures, the fourth with body glabrous and the last with 

 body pilose. Ischnocnemis: with ivory vittse. Oxoplus: prothorax with 

 acute lateral spine. 



Xylotrechus: tibial spurs large. Cyllene and Calloides: intercoxal pror 

 cess rounded, the first with pronotum transversely excavated at sides. Neo- 

 clytus: front quadrate. Clytus. head not carinate. 



Monilema: front tibiae sulcate on inner side, humeral angles not prominent. 

 Ipochus: body densely pilose. 



Pogonocherus: front tibiae sulcate on inner side, front coxae not protuberant. 

 Monohammus and Synaphoeta: scape of antenna with apical scar, the former 

 with body elongate. Acanthoderes, Ccenopocus, Hyperplatys and Acanthoci- 

 nus: front coxs rounded, the first with scape of antenna clavate, the second 

 with lateral tubercle of thorax at middle, the third with a long ovipositor. 

 Lipsimena: middle tibiae without external sinus. 



Tetraopes: last joint of palpi cylindrical and pointed. Idomea and Methia: 

 elytra abbreviated,, the antennae of the latter apparently ten-jointed. Saper- 

 da: all claws simple. Oberea: with two eyes. 



Elaphidion: prothorax not margined. AtimLa: stridulating plate divided. 

 Poecilobrium, Hybodera, Cairimus, Megobrium, Molorchus and Callimoxys: 

 front coxal cavities closed behind, the first four with first abdominal seg- 

 ment very long, the first with palpi broadly triangular, the second with 

 punctures fine, the third with mesosternum wide, the last with hind tibiae 

 curved inwards. Malachopterus, CEme, Eucrossus and Haplidus: ligula 

 horny, the last with palpi slender, the first two with prosternum laminiform, 

 the first with prothorax lobed at base. Bothrylus: front coxal cavities angu- 

 lated. Aneflus: antennae carinate. Romalium: metaepisternum narrower 

 behind. 



Prionus. Ergates and Mallodon: prothorax pleuridentate, the first with 



