130 TRICHOPTERYGIDZ. 
Differs from the other species of the genus in its narrow subparallel convex form, 
strongly constricted thorax, dark castaneous colour, and deep sculpture. 
Obs. I feel doubtful whether this insect is a true Ptinella; it differs very much from 
the more normal species in its convex and corneous integument, but, so far as I have 
been able to discover, does not present any anatomical difference. 
CHAMPIONELLA. 
Championella, Matthews, Trans. Am. Ent. Soc. xi. p. 118 (1884). 
Antenne 11-jointed—2 rather longer than 1, 3-7 nearly equal, 8 longer and somewhat incrassate, 9-11 
incrassate, gradually increasing in length and breadth. Palpt: mawillary rather large, with the penul- 
timate joint much incrassate, ovate, broadly truncate at the apex, the terminal joint aciculate, long, and 
sinuated ; labial short, robust, second joint narrower than the first, with a long divergent seta at the outer 
apical angle, the terminal joint ovate. Lingua broad, with the apex obtuse and dentate. Labsum moderate, 
with the apical margin concave ; paraglosse small, almost rudimentary. Mentwm rather large, oblong, with 
the sides faintly incurved, furnished with two small sete near each anterior angle. Mandibles rather 
large and robust, with the apex acute, scarcely hooked, minutely dentate at the back ; lamella membranacea 
small, nearly circular; stipes large, produced into a long, very acute, curved process behind the mandible, 
and also with a smaller sinuated process near the base. Mawillw 3-lobed; outer lobe corneous, formed 
by a pointed incurved process of the stipes; middle lobe coriaceous, short and broad, indistinctly 3-jointed, 
furnished at the apex with a long brush of strong sete; inner lobe corneous, large and robust, armed with 
three long and strong incurved teeth at the apex. Labrum large, semioval, constricted before the middle, 
furnished with three large sete below the middle, and a curved row of smaller sete on the dise towards the 
apex. Head moderate, prominent. Pronotwm rather small, not constricted. Scutellum small, triangular. 
Elytra very short, abruptly truncate. Abdomen robust, pointed, with four long segments wholly uncovered. 
Prosternum moderate, falcate ; episterna very small, distinct ; epimera rather large; coxal cavities contin- 
gent, enclosed posteriorly. Mesosternum large, minutely carinate, the carina pointed behind, extending 
between the coxe; episterna not reaching the shoulders ; epimera very large and broad, reaching the coxal 
cavities. Metasternum large, extending to the sides; episterna and epimera covered by the epipleura and 
inflexed margin of the elytra, leaving the extremity of the epimera only visible. Venter composed of seven 
segments; the first segment twice as long as the second, 2-7 nearly equal. Legs moderate; tibie 
faintly dentate on the inner edge; tarsi rather short, with the basal joint much longer than the second, 
the terminal joint slender; claws very slender; posterior femora very robust. Covw: anterior contingent 
and prominent; intermediate oval, divided by the carina; posterior widely distant, long, and prominent, 
not at all laminate. 
Championella is distinguished from Ptinella by its convex corneous integument, form 
of the pronotum, abrupt truncation and straight apex of the elytra, diverse form of the 
autenne, and the total absence of lamination on the posterior coxe. 
The single species, like Ptinella, is subcortical in its habits; it is found beneath the 
bark of pines. 
I have named this genus after Mr. G. C. Champion, as a well-earned record of his 
energy and perseverance in the pursuit of these microscopic animals. 
1. Championella nubigena. (Tab. III. fig. 24.) 
Championella nubigena, Matth. Trans. Am. Ent. Soc. xi. p. 119°. 
Elongato-ovalis, valde convexa, nitida, castanea, pilis argenteis parce vestita ; capite prominente, sat longo ; oculis 
parvis, haud prominentibus ; pronoto quam caput paullum longiore et latiore, prope medium latissimo, nitido, 
leviter et confertissime tuberculato, aut potius alutaceo, lateribus rotundatis, leviter marginatis, margine 
