PARASITICA — CIIALCIDID^. 65 



spurs being uniisnally flevelo])C(l ; tlic tiirsi iilthougli generally 5- 

 jointed, have sometimes only 3 or 4 joints. The abdomen is of varied 

 shape, both in the difterent species and in the sexes of the same spe- 

 cies; sometimes it is petiolate, but usually sessile or subsessile, or 

 rather connected to the thorax by a very short narrowed portion of 

 its base; the ovipositor is generally concealed, although occasionally 

 it is exserted and longer than the body. 



Mr. L. O. Howard, who has made the study of this interesting- 

 family a specialty, has published a " Synopsis" of the subfaujilies and 

 genera in the E)iiomo/o(/ica Americana for 1886, from which the fol- 

 lowing tables are copied almost verhatim. 



The family is divisible into two Sections, as follows : 



Tarsi .^-jointed ; anterior titiia- armed with a large carved si)iir ; antennae usually 

 many jointed MACKOCENTRI. 



Tarsi usually 4-jointed, rarely .j-jointed ; very rarely heteromerous : anterior 

 tibiie with a delicate, shoi't. straight spur; antennie usually with few joints. 



MICROCENTRI. 



Table of Subfamilies. 



Sectiou MACKOCENTRI. 



Posterior femora much swollen 2. 



Posterior femora not greatly enlarged 3. 



2.— Anterior wiugs folded ; ovipositor curved over dor.suni of the abdomen. 



Leucospidinse. 

 Anterior wings not folded ; ovipositor not curved over dorsum of the ab- 

 domen — Chalcidinse. 



:5.— Thorax strongly developed, much arched and deeply punctate 4. 



Thorax not greatly developed ."i. 



4. — Stigmal vein not developed; second abdomiiuil segment inclosing the rest. 



Bucharinse. 



Stigmal vein developed ; abdominal segments plainly seen Perilampinee. 



5. — Collar large: autennse many jointed; parapsidal sutures of mesotliorax com- 

 plete 6. 



(dollar small, frequently not visible in the middU^; antenuic usually with 



few joints 7. 



6.— P.ody not metallic; sides of scutellum almost straight Evtrytominee. 



Body metallic; sides of scutellum both curved ToryniinEe. 



7. — Mesosternal pleura not discernible; middle legs long, saltatorial, witli very 



long tibial spur 8. 



Mesosternal pleura usiuiUy well marked; middle legs not saltatorial; first 



tarsal joint not swollen and incrassate }). 



8. — Marginal vein long; occipital margin of vertex rounded ; antenna^ i:i-jointed. 



Eupelminse. 



Marginal vein usually very short; antennse generally 11-jointed ; occipital 



margin of vertex usually acute; parapsidal sutures of nusothoiax 



obliterated Encyrtinse. 



TKANS. AMER. ENT. SOC. (9) SUPPL. VOL. 1887. 



