22 Rev. T. A. Marshall’s Monograph of 
28. Dacnusa abdita, Hal. (PI. 1., fig. 4.) 
D. abdita, Hal., Hym. Brit., ii, p. 13; Marsh., lb. 
Cit... 294, 6 Y 
Mesopleure without a distinct furrow. @ Black, shining, with 
scattered pubescence ; abdomen in general entirely black, some- 
times the segments cinctured with testaceous along the hind 
margin. Head short, transverse, wider than the thorax ; clypeus 
brown; mandibles rufous ; palpi whitish. Antenne longer than 
the body, black, with the scape testaceous, 51-35-jointed. Thorax 
short, gibbous, oval ; on the mesonotum before the scutellum is an 
oval fovea more or less distinct, which is prolonged into a channel 
on the disk ; metathorax short, rugose, truncate posteriorly. Wings 
ample, hyaline, minutely hairy ; squamule testaceous ; nervures 
and stigma fuscous, the latter stout, elongate, linear-lanceolate, 
sometimes attenuated at the base, close to which it emits the radial 
nervure ; radial areolet large, much longer than the preebrachial, 
strongly dilated and sinuated before the extremity ; recurrent 
nervure directed towards the inner lower angle of the 2nd cubital 
areolet. Legs testaceous ; hind tarsi and tips of the hind tibiz 
infuscated, tarsi shorter than the tibiz. Abdomen convex, sub- 
orbicular ; 1st segment sublinear, somewhat contracted before the 
tubercles, which are conspicuous and situated in the middle ; the 
following segments very smooth, ciliated on the margins; belly 
testaceous. ‘lerebra hardly exserted. 2 similar, but more 
slender ; antenne (in 3 examples) 32-jointed ; abdomen depressed, 
oblong, with parallel sides ; posterior segments obscurely bordered 
with testaceous. Length, 11 lines; exp., 3 lines. 
‘This species may be known by the unusual direction of 
the recurrent nervure, and the exceptional shortness of 
the hind tarsi; otherwise it is very hke D. talaris (sp. 3) 
and D. lateralis (sp. 15); in D. talaris the hind tarsi are 
as long as their tibie ; in D. lateralis the hind tarsi are 
short, but the antenne very much longer. Found in 
England and Ireland ; a supposed parasite of some Phy- 
tomyza, Whose larva lives in the parenchyma of leaves. 
29, Dacnusa gilvines, Hal. 
guvipes, 
D. gilvipes, Hal., Hym. Brit., 11., p. 12;.Marsh., 7b; 
City Peano, oy. 
Mesopleurz with a crenulate furrow. Antennee 25-29-jointed. 
@ Black, shining, finely pubescent ; mandibles, clypeus, and palpi 
