one. 
179 
,ne It does not appear, then, why the C>^nips should not come 
nninjured ; as the contents of these large galls seem to be more 
enough both for the legitimate owner and the intruders billeted 
him. These guest- gallflies have been a fruitful source of error 
.servers. No less than 7 of the species described by Lnme as 
y. o-alls. are in fact referable to the genus Synerrjns. The nume- 
species have found no describer but Hartig, whose brevity renders 
nlikely that any one should succeed in identifying them with 
unty. The second group, the Aj>Mdivor., consists of the nume- 
and minute species of the genus AUotria, which live m the W 
pupal states in the bodies of plant-lice, and stand first among the 
aine parasites. They are distinct from those which follow by their 
eture, which closely resembles that of Cynips. The members of 
third* group are all true parasites, infesting various insects and 
,cially, it would seem, appointed to keep down the numbers of the 
terous order. I shall now give a short table of the British genera, 
)re proceeding in my proposed attempt to reckon up the indigenous 
3ies. 
Facies prope clypeum striolata. Prono- 
tum sensim declive. Terebra exserta. 
Cox^postic^ distantes I- stxeegus, Hart. 
Facies hand striolata. Pronotum verti- 
cal. Terebra hand exserta. Coxa; 
posticie approximate. 
A.. Scutelli fovea cyathiformis, marginata. 
Abdomen segmeuto 2'^° maximo, crete- 
ris brevissimis. (Eucoilidcs.') 
a. Ale apice integrte, uec ciliatfe. 
b. Abdomen segmento 2-^" basi hand 
+nmpntoSO ^' COTHOKASPI?, 
tomentoso (Hart.) Thorns. 
hb. Abdomen segmento 2*" basi to- 
mentoso. 
c. Metapleura) baud tomentosje. 
Ale complete. Antennarum 
articulus T' 2'" longior 4.. eucoila, AVestw. 
cc. Metapleura; tomentosa\ Abe 
abbreviate. Antennarum ar- 
ticulus r-= 2'^'' parum longi or..6. olauhaspidia, Thorns. 
