species of parasitic Cynipidce. 369 



Allied to P. longicornis, Htg. (gracilis, Dbm. sec. 

 Thorns.), but that is a slightly larger species. The tegulas 

 with it are red ; the foveae at base of scutellum are larger, 

 deeper, and the outer margin is red or piceous, and is 

 not striated as in similis. The hair on the metanotum 

 is much thicker and denser, the antennas are shorter, 

 the joints thicker, especially at base of flagellum, and 

 the antennas are entirely red, as are also the legs. As 

 with most of the species, the base of abdomen is some- 

 times red. 



Hab. Cambusland, along the banks of the Clyde, 

 July. 



Psichacra Marshalli, n. s. 



Black; antennae fuscous-black; legs reddish testaceous; 

 coxae for the most part black ; tegulae testaceous. An- 

 tennae much longer than the body (nearly double), fili- 

 form ; 3rd joint thickened, slightly curved, longer than 

 4th. Head and thorax opaque, alutaceous. Scutellar 

 cup small, narrow, longer than broad, acutely pointed at 

 base. Foveae at base of scutellum large ; their outer 

 border piceous, and ending in an acute tooth. Meta- 

 notum densely hairy. Wings hyaline, but with a slight 

 fuscous tinge ; nervures testaceous. Length, 3 mm. 



The opaque alutaceous head and thorax, small nar- 

 row cup of scutellum, and thickened curved 3rd joint 

 of antennae, easily enable this species to be separated 

 from longicornis and similis. 



Hab. Barnstaple (Rev. T. A. Marshall). 



Trybliographa nigricornis, n. s. 



Black ; extreme apex of coxae and trochanters, knees 

 broadly, tibiae and tarsi, testaceous ; the latter two 

 infuscated towards the apex. Antennae not much shorter 

 than the abdomen and thorax together ; 3rd and 4th 

 joints equal in length ; 5th a very little shorter ; 6th to 

 12th moniliform, longer than broad, striated, thicker 

 than the basal joints ; last joint not much thinner, but 

 longer than penultimate. The thorax is covered with 

 a scattered pale pubescence ; the scutellum rugose, its 

 cup almost oval ; sides of metathorax covered with long 

 griseous hair. Abdomen a little longer than the head 

 and thorax together, somewhat compressed; the hair- 



