96 KOTES ON CHAI.C1DJ.E. 



Tripedias, one of which is a parasite of Cecidomvia tenebricosa and 

 of C. Tremuke. He mentions a species of Psilonotus, which he 

 names P. Catuli, and says that it has much resemblance to P. Hor- 

 tensia. He changes the name Raphitelus to Raphidotelos, and 

 observes that it is Stylocerus of Ratzeburg, which that author altera 

 to Storthygocerus. R. maculatus is a parasite of Hylesinus Spartii, 

 and R. Ladenbergii, Rate., of H. Fraxiui. 



Hormocerus impletus. Fiem. — Loete viridis, crassus ; antenna? 

 nigra?, Bubclavatffi, thoraci fequilonga? ; abdomen ovatum, subsessile, 

 cupreo varium, thoraci aequilongum ; pedes nigri, geuubus fulvis, 

 tibiis apice tarsisque albidis ; ake diapkame. 



Female. — Bright green, very stout. Head and thorax finely 

 squamous. Head as broad as the thorax. Antennae black, sub- 

 clavate, as long as the thorax. Thorax very convex. Prothorax 

 very short. Sutures of the parapsides distinct. Metathorax short. 

 Abdomen subsessile, oval, very finely squamous, partly cupreous, as 

 long as the thorax. Legs black ; knees tawny ; tarsi and tips of 

 tibia? whitish. Wings pellucid ; veins tawny ; ulna a little more 

 than half the length of the humerus; radius much shorter than the 

 ulna; cubitus much shorter than the radius. Length of tbe body 

 1 line. 



It resembles H, Sabbas, but is much stouter. 



Corsica, In the collection of the Rev. T. A. Marshall. 



Fam. 13. SPHEGIGASTERHXE. 



A. Head unusually developed ; front with two 



sharply defined edges between the eyes. Oahatomus, 



B. Head not unusually developed, 



a. Ulna of the fore wings unusually long, 

 occupying the greater part of the fore 

 border. .... Dipaka. 



h. Ulna of the fore wings not unusually long. 

 * Ulna much incrassated. 



f Mesothorax with two deep furrows. - Pachtcrepis. 



•f-f Mesothorax with no deep furrows. 



I Abdomen flat above or compressed. - Pachynei RON. 



JI Abdomen convex above. 

 § Sixth abdominal segment (the petiole being 

 reckoned as the first) as long as the fifth ; 

 seventh and eighth very small in the 

 female. .... EoMBI RA. 



