TALANUS.—PYANISIA. 329 
middle, the flanks of the prothorax with a few scattered very shallow impressions; metasternum very 
short ; intercoxal process rounded ; body apterous. 
Length 63-72 millim. (¢ 2.) 
Hab, GuateMaa, Senahu and San Juan in Vera Paz (Champion); Panama, Volcan de 
Chiriqui (Champion). 
Numerous examples. In the colour and structure of the antenne this insect 
resembles 7’. longicornis, but is readily separated from that species by the ovate and 
almost gibbous elytra (the sides of which are not abruptly narrowed immediately before 
the base as in the winged forms), the smoother under surface, absence of wings, &c. ‘The 
two examples from the State of Panama have the elytra castaneous in colour, and the 
thorax not quite so coarsely punctured; both, however, appear to be a little immature. 
We figure a male example from Senahu. 
Group AMARYGMIDES. 
This group is represented in the New World by a single genus, Pyanisia. With 
the “ Amarygmides” we commence Lacordaire’s second great division, the “ Otido- 
génes,” of the Tenebrionide ; in this and the following group the sides of the front 
above the point of insertion of the antenne (the antennary orbits) are raised above the 
level of the head and form an oblique ridge. 
PYANISIA. 
Pyanisia, Castelnau, Hist. Nat. Ins. Col. ii. p. 235 (1840) ; Lacordaire, Gen. Col. v. p. 476 (1859). 
Cymathotes, Blanchard, Hist. Nat. Ins. 11. p. 33 (1845). 
Cymatothes, De}. Cat. 3rd edit. p. 230; Solier, Studi Entom. i. p. 178, t. 6. figg. 1-5 (1848). 
A Tropical-American genus ranging from Brazil to Northern Mexico, and also 
inhabiting the Antilles *; it now contains eleven described species, four of which are 
peculiar to our region. ‘These insects are found beneath loose bark or about fungoid 
growths on decaying trees, often in gloomy places in the forest; the spotted species 
resemble various Erotylide inhabiting the same district. 
In the vertically-inclined head Pyanisia approaches Talanus. 
1. Base of the prothorax very strongly bisinuate. 
a. Upper surface maculated. 
1. Pyanisia undata. 
Helops undatus, Fabr. Ent. Syst. i. p. 122° Oliv. Ent. iii. 58, p. 11, t. 2. f. 4”. 
Pyanisia undata, Casteln. Hist. Nat. Ins. Col. ii. p. 235°. 
* Hoplonyx uniformis, C. O. Waterh, (Trans. Ent. Soc. Lond. 1878, p. 306), from Jamaica, is a Pyanisia. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, December 1887. 2U0U 
