/6A 
m- )t 
566 . 
Cx\TOPS DISSIMULATOR. 
Order Coleoptera. Fam. Anisotomidae or Silphidae. 
Type of the Gems, Helops chrysomeloides Panz. 
Catops Payk., Curt. — Choleva Lat., Spence. — Ptomaphagus III . — 
Cistela and Tritoma Fab. — Helops Panz. — Mordella Mars. 
Antennae sometimes stouter in the females than in the males, in- 
serted before the eyes (8), as long as the thorax, clavate, pilose 
and 11 -jointed, basal joint oval, 2nd and 3rd obtrigonate, the 
former shortest, 3 following cup-shaped, the remainder much 
stouter, excepting the 8th joint, which is saucer- shaped, 7th 
9th and 10th somewhat cup-shaped, 11th the largest, ovate, sub- 
mucronate and compressed at the apex (6 <$). 
Labrum transverse, with a transparent margin, deeply notched, 
pubescent and furnished with a few short bristles (1). 
Mandibles trigonate, very broad at the base, acute, with a notch 
on the inside below the apex, with a small portion ciliated (2). 
Maxillae rather slender, terminated by an elongated rounded 
lobe, the internal one much shorter, horny outside and pubescent 
within. Palpi rather short and 4-jointed, basal joint minute, 
2nd and 3rd rather short, the former sublanceolate, the latter 
stoutest and hairy outside, 4th the longest, subulate, compressed 
at the apex (3) . 
Mentum transverse, trapezate. Labium large, subcordate and 
ciliated, the centre sharply notched and thickened. Palpi at- 
tached to scapes, inserted beneath the transparent margin of the 
mentum, remote, short and triarticulate, basal joint a little the 
largest, oblong, 2nd more quadrate, 3rd short and the slenderest, 
subovate, the apex soft (4). 
Head subovate, anterior portion rather produced, as well as the sides 
at the base (8) : eyes small lateral and ovate. Thorax transverse, 
convex, the sides rounded, the base straight, with the angles acute : 
scutellum triangular. Elytra broader than the thorax , ovate-conic, 
convex and faintly striated. Wings ample. Legs moderately long : 
thighs, anterior with a tubercle beneath in the male (5 ; tibiae, 
anterior dilated at the apex in the male and surrounded with spines , 
longest in the female (5 $ ), the others producing long spurs at the 
apex, especially the hinder pair : tarsi elongated 5 -jointed, 4 basal 
joints heart-shaped in the anterior, the first 3 dilated and very woolly 
beneath in the male, the basal joint also dilated in the middle pair, 
in the same sex : claws long and acute. 
Dissimulator Spence. — Curt. Guide, Gen. 178. 9. 
Subelliptic, piceous, clothed with rather long ochreous depressed 
silky hairs, slightly scabrous; head punctured ; antennae stout 
towards the apex, 2 basal joints and tip of the last, as well as 
the trophi rusty ochre : thorax lurid-piceous, yellow with hairs : 
elytra depressed down the suture, blacker, the hairs more fus- 
cous, forming obscure striae; legs ferruginous ochre, thighs more 
fuscous, the anterior only at the base. Obs. the female is often 
blacker, with more of the basal joints, and the whole of the apical 
one ochreous. 
In the Author s and other Cabinets. 
