72 HYMENOPTEEA. 



feeders and often distort the galls which they inhabit. From their habits they have 

 been called " Cuckoo-flies." 



SYNEKGUS. 



Synergus, Hartig, Germ. Zeits. ii. 1840, p. 186 ; Foerster, Verb., zool.-bot. Wien, 1869, p. 332. 



1. SynergUS filicornis. (Tab. IV. fig. 10 2 ; 10 a, antenna.) 



Rufo-testaeeus; antennis (basi excepto), vertice, pleuris, metathorace abdominisque dorso nigris ; pedibus flavo- 



albidis, tarsis posticis nigris ; alis hyalinis, nervis testaceis. 

 Long, fere 3 millim. 



Hab. Guatemala, San Geronimo (Champion). 



The vertex is shagreened, shining ; the face when looked at with a strong glass has 

 a matted appearance as if it were covered with fine hair ; the pronotum and mesonotum 

 closely punctured longitudinally ; pleurse transversely striated, shining in the centre, 

 more opaque at the sides ; the abdomen is smooth and shining ; the apex finely 

 shagreened ; ovipositor black. 



2. Synergus dorsalis. 



Rufo-testaeeus ; macula mesonoti, metathorace, pectore abdominisque dorso nigris ; pedibus flavo-albidis ; alis- 



hyalinis, nervis testaceis. 

 Long. 4 millim. 



Hab. Guatemala, San Geronimo (Champion). 



The head and thorax are finely rugose; the pleurae striated; abdomen finely 

 shagreened ; ovipositor black ; the third joint of the antennae is a little longer than 

 the fourth ; the fourth, fifth, and sixth are subequal ; the rest are wanting. In most 

 of the specimens the space enclosing the ocelli and the part behind it, a broad stripe 

 on mesonotum, and the basal half of scutellum are black. 



Differs from 8. filicornis in having black on the mesonotum, the thorax more 

 strongly punctured, abdomen shorter and not so much compressed, it being not much 

 longer than thorax ; wings shorter, and the hind tarsi are not black. In the male the 

 thorax and abdomen are entirely black, as well as the greater portion of the sides 

 of the latter. 



All my specimens were cut out of the galls of Cynics guatemalensis. 



Subfam. PARASITICA. 



EUCOILID^E. 



The species of this group are easily recognized by the cup-shaped hollow on the top 

 of the scutellum. 



The European species have been distributed among a large number of genera by 



