genera and species of Hymenoptera. 197 



Bred from the galls of " Cecidomyia pruni" Kalt.,* 

 found in Mugdock Wood, near Milngavie, the insects 

 emerging in August. 



Parasierola, n. g. 



This genus agrees with Sierola in the structure of the 

 humeral cellules, and especially in having a small oval 

 cellule at their end and close to the prostigma ; but it 

 differs from it in having the radial cellule quite open, as 

 in Goniozus. From the latter it may be readily known 

 by the presence of the above-mentioned oval cellule, 

 which is completely open on the lower side in the latter. 

 Compared with Sierola, the head is more produced and 

 narrowed in front of the antennae, and there is a distinct 

 carina, which is absent in the other, the keel on the 

 metanotum being also more distinct. The wings, too, 

 are shorter, being not much longer than the thorax. 



Parasierola testae eicornis, n. s. 



Black ; the antennae, knees, tibiae, and tarsi, tes- 

 taceous ; the posterior tibiae darker, almost fuscous ; the 

 apex of the antennae blackish. Head and thorax finely 

 shagreened, and bearing minute roundish punctures, 

 especially on the head and mesonotum. Abdomen 

 smooth, shining, impunctate : there is a blunt keel on 

 the centre of the metanotum, which ends where the 

 metathorax commences to slope ; the slope is rather 

 abrupt. Prothorax more than two-thirds of the length 

 of the thorax ; its sides are perpendicular and somewhat 

 hollowed. The head projects beyond the antennae into a 

 sort of snout, and a distinct keel runs between them, 

 this keel originating close to where the eyes end. The 

 femora are thickened, the anterior especially ; the 

 anterior tibiae are thicker than the others. Antennae 

 shorter than the thorax, stout, tapering towards the 

 apex ; the basal joint is much longer and thicker than 

 the others ; the middle joints subequal ; the last is 

 longer, a little longer than the 12th. Wings fuscous ; 

 nervures testaceous ; stigma and prostigma fuscous. 

 Length, nearly 5 mm. 



Hab. Brazil. 



* Die Pflanzen-feinde, p. 175 ; F. Loew, Verb. z.-b. G. Wien, 

 xxv., pi. ii., fig. 3. 



