124 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



TOii. 55. 



joint, the apparent second ring- joint being a much reduced fimicle 

 joint. Study of a series of specimens of L. perplexus shows the 

 fourth antennal joint to be usually no longer (often slightly shorter) , 

 but usually verj^ slightly broader than the third joint or true ring- 

 joint. In some cases the jfifth joint is greatly reduced and might be 

 mistaken for a right- joint. (See fig. 1.) 



PSUEDERIMERUS, new genus. 



Except for the unicalcarate hind tibiae, the type of this genus 

 appears to be more closely allied to the genus Liodontomerus in the 

 subfamily Monodontomerinae than to the type-genus of the Erim- 

 erinae. I am unable to see more than the one spur, however, and 

 therefore have placed the genus in the Erimerinae, where it would 

 run in Mr. J. C. Crawford's key to the subfamilies of Callimomidae.^ 



Differs from Ervmerus in 

 the emarginate first and sec- 

 ond tergites, in antennal 

 characters and different hab- 

 itus. 



Head transverse, about 

 equal in width to the thorax 

 at tegulae; occiput slightly 

 concave, immargined; ocelli 

 in an obtuse triangle; head, 

 viewed from in front, ap- 

 proximately as long as 

 broad, narrowed below, the 



Fig. 1.-LI0D0NT0MERU3 PERPLEXUS. ANTENNA FROM ^^1^1" SpaCO mUCh loUger 

 TWO PARATYPE FEMALES ILLUSTRATING VARIATION IN thaU tlie wlclth of a UiaU- 

 THE FUNICLE JOINTS. ^-^^J^ ^^ ^^^^ . ^y^g ^^^^ 



slightly diverging below; antennae inserted just above the clyp- 

 eus; frontal impression for receipt of the scape rather deep, 

 narrow, and extending to the front ocellus; antennae 13-jointed; 

 pedicel as long as the four following joints combined; joint 3 

 of the antennae is a true ring-joint, joints 4 and 5 also ring- 

 like but broader than joint 3; joints 6, 7, and 8 all broader than 

 long and increasing in breadth and thickness from 6 to 8; joints 

 9 and 10 very slightly broader than long, subquadrate ; club broader 

 than the funicle, about equal in length to the four preceding funicle 

 joints, 3-jointed, the suture between the penultimate and last joint 

 very indistinct; pronotum transverse, somewhat conically produced, 

 the dorsum and sides rounded ; mesoscutum broader than long, with 

 distinct sharply curved parapsidal grooves; axillae broadly sepa- 

 rated; scutellum nearly flat, without a cross furrow; propodeum 

 short, without lateral folds or spiracular sulci and without distinct 



»Proc. Ent. Soc. Wash., vol. 16, 1914, p. 123. 



