228 [March, 
Note 1.— One $ of this species, sent me by Mr. Rye, is entirely apterous. The 
wings may have been lost by some accident, but no torn stumps are 
visible. 
Note 2. — This species is very variable in size, and easily confounded with 
others. The full-sized males are the largest insects of the genus. The 
distinctive characters of the species are the 4th joint of the antennae, 
which in the <? is twice, or more than twice, as long as the 2nd ; in the 
? the apical joint, which is longer than the preceding; and in both sexes 
the black tegula). 
Common in several parts of the countiy ; near London, Cheltenham, &o. In 
Mr. Walker's collection and my own. 
7. — Spilomicrus nigriclavis, n. sp. 
Niger, politus ; anteTwice artt. 3 — 7 rufescentibus, clava G-a/rticulata, pa/rum 
discreta. Alee abdomine hreviores, augustce, infuscatce, volatui vix idoneas ; posficce, 
casta ciliata. Tegulce nigrcB. Caput parce griseo-pilosum. Pedes ntfescentes, coxis, 
trochamterihus, femorumque clavis medio nigris. Tarsi articulo penultimo prater 
hasin, ultimo toto, nigris. Abdomen apice griseo'villosum. 
$ . Long. If ; aim. exp. 2f Un. 
Most resembles nigripes, which is distinguished by having the stria> of the 
mesonotum impressed at the base, by the developed wings, colour of the legs, and 
structure of the antennae. The present species has the thorax villose at the sides 
and shoulders, and the tibise clothed with pale concolorous hairs. From stigmati- 
calis it differs in having the apical joint of the antennae larger than the preceding ; 
and from integer in having the mesonotum bisulcate. 
This remarkable species, from the London district, was given to me by Mr. Rye. 
Genus Loxoteopa, Porster, Hym. Stud., ii., pp. 122, 123, 126. 
Basalys, Hal., N. H. Rev., vol. iv., p. 171. 
Basalys, Sect. B, Thorns., Ofv., 1858, p. 368, 
Antennae of the S larger than the thorax, 14-jointed, 4th joint not longer than 
the 3rd, sinuated at the base ; of the ? 12-jointed, clavate, the club abrupt, 3 — 4- 
jointed. Mesonotum without dorsal lines. Scutellum depressed, margined at the 
sides, with a basal foveola. Abdomen somewhat depressed, 2nd segment without 
a basal furrow, not conically produced and acuminated in the ? . Femora and 
tibiae clavate. Wings ciliated, sometimes abbreviated or wanting ; costal nerve 
none ; sub-costal ending before the middle in a punctiform triangular stigma ; the 
basal transverse nerve distinct. Pronotum and petiole lanate. 
The males of Diapria, Latr., and Basalys, Westw., have 14-jointed antennae, but 
the wings of the former are without a basal nerve, and in the latter genus the 4th 
joint of the antennae is distinctly longer than the 3rd. Again, the females of 
Glyptonota, Forst., Diapria, Latr., and Idiotypa, Forst., have the antennae 12- 
jointed, but the two former genera have no basal transverse nerve, and the last has 
the mesonotum bisulcate, and the club of the antennae 5-jointed. The type of 
Lowotropa is Psilus antennatus, Jurine. There are several British species, only a 
few of which have been indicated. 
I. Club of the antenna) 4-jointcd. $ . 
