Mesoletus | BRITISH ICHNEUMONS. 143 

4. colon, Grav. 
Tryphon colon, Gr. I. E. ii. 211, ¢; (?) Fonsc. Ann. Soc. Fr. 1849, p. 223, ¢. 
Mesoleius colon, Brisch. Schr. Phys. Ges. Konig. 1871, p.83; Schr. Nat. Ges. 
Danz. 1878, p.88, ¢. M. (Barytarbus) colon, Thoms. O. E. ix. 931; xvii. 
1874, 3 ?. 
Head posteriorly constricted; mouth flavous, g face white; clypeus 
not apically emarginate, but with the margin depressed. Antennae sub- 
setaceous, nearly as long as the body, infuscate with the twelfth to 
fifteenth joints entirely, and in at least ¢ scape beneath, white. ‘Thorax 
black ; metathorax not apically constricted, with neither areae nor costae. 
Scutellum and postscutellum stramineous. Abdomen a little longer than 
head and thorax, dilated towards apex, black with segments two to four 
red; first sometimes apically castaneous, second sometimes more or less 
broadly black discally and the fifth basally badious; sixth and seventh 
apically whitish; basal segment smooth, nearly thrice longer than broad 
and laterally immarginate. Legs somewhat slender; anterior with tibiae 
and tarsi pale flavous, femora fulvous, and both coxae and trochanters 
black and white marked; @ with anterior coxae below and trochanters 
white ; hind legs long and stout, black with the femora except apically 
red, the spinulose tibiae basally dull white, and the third and fourth tarsal 
joints pale; hind calcaria extending beyond centre of their metatarsus ; 
all the claws and their dark joints stout. Wings slightly clouded ; stigma 
piceous, radix and tegulae flavous; areolet wanting, basal nervure 
oblique, parallel nervure emitted from far below centre of brachial cell ; 
nervellus subopposite. Length, 7—8 mm. 
This species stood as an insufficiently described Z7yphon in our last 
catalogue, and was placed by Brischke in J/esolecus, as is noted by Bridg- 
man (Trans. Ent. Soc. 1882, p. 158), but that the former recognised this 
species is rendered doubtful by his statement that the nervellus is unter 
der Mitte gebrochen; I think de Fonscolombe’s male with distinctly 
punctured segments must belong to another species, since in this they are 
transversely alutaceous. 
Very little is known of this conspicuous species, which occurs rarely in 
August in Silesia, Prussia, Sweden, and Gaulle says, France. It has long 
stood in our List on the strength of the two males in Mus. Brit., found by 
Desvignes (Cat. 39), and must be rare with us, since the only other male 
I have seen was taken by Capron in Surrey about 1880. 
5. pini, Bridg. 
Mesoleius pint, Bridg. Trans. Ent. Soc. 1882, p. 156, ¢ ¢. 
Head not buccate, slightly constricted posteriorly; mouth, apices of 
cheeks and the apically sinuate clypeus flavous. Antennae with mark on 
underside of scape flavous. ‘Thorax with distinct notauli; pronotal mar- 
gin or in Q most of prothorax, triangular humeral mesonotal marks, cal- 
losity at radices, propleurae, mesosternum except laterally and basal 
suture of mesopleurae, flavous; mesosternum laterally piceous or red; 
mesopleurae reticulate, sparsely and finely punctate; areola and petiolar 
area more distinct in 9. Postscutellum and lateral basal margins of 
scutellum flavous, more broadly in 2. Abdomen black and centrally 
subbadious, with all the segments except the first narrowly pale apically ; 
