16 PSELAPHIDZ. 
11. Batrisus coronifer. 
Batrisus coronifer, Reitt. Verh. z.-b. Ges. Wien, 1882, p. 875" 
Hab. Panama 1, 
According to a type communicated by Herr Reitter, this insect is allied to B. arma- 
tellus, but is of more dilute colour, with elongate slender antenne, the spine on the 
front of the head indistinct, and the vertex in the middle behind somewhat raised and 
emarginate; the depressions behind the clypeal spine slight compared with those of 
B. armatellus. 
12. Batrisus plicicollis. 
Batrisus plicicollis, Reitt. Verh. z.-b. Ges. Wien, 1882, p. 376°. 
Hab. Mexico, Orizaba (Bilimek *). 
Reitter supposed he had both sexes of this species, but the five individuals I have 
received from him are all females; and as he has not indicated any of the characters. 
usually distinctive of the male in this group, I imagine this sex is most probably still 
unknown, and anticipate it will prove to have the head ornamented by some structures 
analogous to those seen in B. armatellus and B. coronifer. The species is readily 
recognized, at any rate in the female sex, by the peculiar form of the thorax, the latter 
being compressed laterally so as to appear longitudinally raised along the middle. 
13. Batrisus vividus. 
Batrisus vividus, Schauf. Nungq. Otios. ii. p. 282* (nec Motsch.). 
Hab. CentraL AMERICA }. 
This insect also was described from a single female, and cannot be identified at 
present ; it is stated to differ from Schaufuss’s supposed female of B. curvicornis in the 
structure of the labrum. ‘The name was originally proposed by Motschulsky ; and 
Reitter’s remarks (Verh. z.-b. Ges. Wien, 1883, pp. 375, 376) as to the confusion with 
regard to specimens existing in collections under this name should be referred to. ‘It 
is quite possible that Schaufuss’s insect may be the female of B. coronifer, Reitt. 
§ 2. Thorax without longitudinal or transverse channels, but denticulate 
at the sides. (Subgen. Oxarthrius). 
14. Batrisus hamaticollis. (Tab. I. fig. 5, ¢.) 
Sanguineus, parce pubescens, nitidus; antennis pedibusque rufis; capite utrinque pone oculos barbato ; pro- 
thorace posterius fortiter bispinoso; elytris impunctatis, humeris sat prominulis. 
Long. 23 millim. 
Hab. Guatemaua, Las Mercedes 3000 feet (Champion). 
