Mar. 1899.] ASHMEAD : On SYNOPSES OF FAMILIES OF HyMENOPTERA. 57 



12. Eyes round or rounded J 



Eyes ovate, oval, or elliptical ; mandibles not excised beneath. 



Head very large, quadrate, about twice as wide as the thorax, or very much 

 wider, the hind angles sharp, or acute ; beneath armed with 4 teeth, two 

 small ones at base of gula and two much larger ones, one on each cheek ; 

 mandibles bidentate, the lower tooth much the longer. 



(Type M. spmosa Roed. ) Hoplomutilla Ashm. g. n. 



Head quadrate or subquadrate, unarmed beneath, and not or rarely much 



wider than the thorax. 



Metathorax truncate behind, the spiracles linear ; mandibles with one or 



small teeth within before apex ; first joint of flagellum longer than the 



5gj.o,.,d Dasylabris Radoszkoivski. 



Metathorax convexly rounded behind, the spiracles rounded or very short 

 oval ; mandibles simple or at most with a slight tooth within some dis- 

 tance before the apex ; first joint of flagellum usually wider than long, 



smaller than the second Ephuta Say. 



(Type E. scrupea Say $ ) = M. parvula Cr. 9 

 13. Head globose or subglobose. 



Mandibles entire, not excised beneath, eyes small ; first joint of flagellum not 



much longer than thick Cystomutilla Andre. 



Mandibles strongly excised beneath, with a process or projection before the 

 incision ; eyes^di.stant from base of mandibles . . Tricholabiodes Radoszk. 

 Head quadrate, subquadrate or transverse. 



i\Iandibles not excised beneath 4 



Mandibles, or at least the left mandible, excised beneath and usually with a 

 process or projection before the incision. 

 Thorax in profile arcuate ; eyes usually with a slight sinus on outer edge 



^gjjj. apex Tricholabiodes Radoszk. 



14. Eves extending to or nearly "to the base of the mandible ; metathorax subtnin- 



'cate • the spiricals oval or elliptical ; mandibles subfalcate with a small tooth 



within, much before apex ; first joint of flagellum obconical, as long or longer 



than the second Photopsis ^/./v. 



Eyes distant from the base of the mandibles, a wide space between. 



Body vei7 hairy ; mandibles simple, acuminate, edentate, or at the most with 

 a sli-ht tooth within before apex ; maxillary palpi 6-, labials 4-jointed, the 

 second and third dilated ; first joint of flagellum as long as joints 2-3 



united (Type 5. gorgcms BlaKE) DasyitlUtilla Ashm. g. n. 



Body bare or nearly bare, or at least not densely hairy; mandibles simple, 

 edentate, or with a light tooth within some distance before apex ; maxillary 



palpi 6-, labials 4-jointed Sph^rophthalma Blake. 



,, 10 



I s. Winged ' ' ' „. , 



^ „,. , . . Myrmilla ]Vesinad. 

 ^^mgless ^ ^^ 



16. Flagellum simple, filiform • " " " 



TTi 11 fl 1 iiot« Psammotherma Ztf/r. 



Flagellum nabellate 



17. Second submarginal cell receiving only one recurrent nervure, the second recurrent 



when present, received by the third submarginal cell i 



Second submarginal cell receiving both recurrent nen-ures. 



(Type M. melicerta Smith) Allomutllia Ashm. g. n. 



