4 



MESSRS. R. E. TURNER AND J. WATERSTON ON THE 



Dentiparal area move coarsely sculptured than 



the external or both smooth and shining 13. 



12. Antennae from 50- to 55-jointed ; hind tarsi fer- 



rnginous, median segment with a transverse 



yellow fascia L. multiarticidatum, sp. n., 



Antennte 45- to 46-jointed ; hmd tarsi black [p. 23. 



from before the apex of the metatarsus, median 



segment without a yellow fascia L. fulvicorne, sp. n., p. 22. 



13. Hind femora black, very narrowly yellow at the 



apex L. scidpturatum, sp. n., $, 



Hind femora ferruginous, at most narrowly black [p. 14. 



at the base and apex 14. 



14. Antennae more than 40-jointed 15. 



Antenna? less than 40-jointed 18. 



15. Mandibles bidentate ; basal tergites narrowly 



margined with yellow L. Jwhartense, sp. n., p. 20. 



Mandibles simple 16. 



16. Dentii)ar:il area unarmed, areola, external area, 



and dentiparal area? smooth i. longicorne, sp. n., $ , p. 23. 



Dentiparal area armed, the carina? strongly raised 



forming small teeth at the outer angles 17. 



17. Antenna? 47-jointed ; face yellow, closely and 



evenly punctured Z,. app^'oxiinatuvi, \\., ^ , 



Antenna? 43-iointed : face ferruginous, margined [p. 21. 



with yellow laterally, centrally rugulose Z,. spiiiiferum, sp. n., p. 12. 



18. Third and "^burth antennal joints subequal 19. 



Third antennal joint much longer than the 



fourth _ 20. 



19. Mandibles strongly bidentate ; hind femora 



shining, with large and rather sparse punctures. L. occidentale, sp. n., p. 16. 

 Mandiljles very obscurely bidentate ; hind femora 

 subopaque, very closely covered with miimte 



l)unctures L. subcequale, sp. n., p. 15. 



20. Distance between the recurrent and second trans- 



verse cubital nervures not equal to more than 

 one-third of the length of the latter nervure; 



nervulus very distinctly postf ureal L. clavicorne Mori., p. 19. 



Distil nee between the recurrent nervure and the 

 si'c-ond tran'^verse cubital nervure equal to at 

 least halt the length of the latter nervure ; 

 nervulus interstitial or very slightlv post- 

 turcal 21. 



21. Petiole ])lack, except at the apex ; mesopleurae 



extensively black superiorly L. montimgum, sp. n., p. 16. 



Petiole nniinly ferruginous ; mesopleura; with 



very little black L. associatum, sp. n., p. 20. 



Labium hicolor Brulle is not included in the Key, as we have not seen a 

 specimen. It is described from a male, and has the hind femora black as in 

 X. sculpturatum, to which, from the description, it appears to be related. 



Labium walkeri, sp. n, (Text-fig. 2.) 



S . Ni,i>er ; manrHbulis, apice brunneis, labro, cl^^peo, facie, 

 fronteque lateribus, genis, orbitis externis, sciitello, basi anguste 

 nigro, postsciitello, tegulis, mesoplenris maciilis duabus, epimeris, 

 pedibiis anticis intermediisque, tarsis intermediis brimnescentibus, 

 coxis posticis apice, trochanteribus posticis, geniibus, tibiisque 

 posticis dimidio basali, basi aiigustissime briinneo annulatis, 

 flavis ; antennis subtus rufescentibus ; femoribus posticis medio 

 late rufescentibus, basi atque apicem versus nigrescentibns ; 

 calcaribiis paJlidis ; alis sul^hyalinis, veois fuscis ; })etiolo apice 



