606 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.57. 



Mesothoracic dorsal plates about three times larger and considerably 

 closer together than the metathoracic plates. Basal plate of cerci 

 about as long as frons, a trifle wider than long. Cerci about the 

 length of basal plate, subparallel; distance between them about 

 half as large as their length, subcylindrical with unequal surface, 

 directed upwards ; apex recurved, not contracted, turned slightly in- 

 wards. Mesothoracic spiracle twice as large as the rest. 



4. Genus GALERUCLERUS Gahan. 



Membranous parts motley. Setae thin, long, not numerous. 

 Head with slightly curved sides, as thick as long. Frons sculptured. 

 Epicranium dorsallj^ rugose without protuberance, ventrally rugu- 

 lose. Ocelli arranged as in genus 2. Antenna with the length of 

 basal, second and apical joints proportioned as 3:1:1^; supple- 

 mentary joint very reduced. Mandible longer than wide ; retinaculum 

 well developed, very slight indication of tooth above retinaculum. 

 Maxilla of medium size, length from condyle of cardo to end of max- 

 illary palpus in proportion to length of gula as 3 : 6 ; the chitinization 

 of cardo occupies half or less of its entire surface ; maxillary palpus 

 with length of basal, second and apical joints proportioned as 1 : 1 : 2 ; 

 palpiger with large, nearly jointlike chitinization. Submentum and 

 mentum without any chitinization. Stipes labii thinly chitinized; 

 length of basal and apical joints of labial palpus proportioned as 

 1 : 2. Prothoracic tergal shield along middle line as long as frontal 

 suture ; prothoracic sternal plate broadly lanceolate. Legs of medium 

 size. Abdomen with normally developed intersegmental membranes; 

 second to seventh abdominal segments with dorsal ampullae. Cerci 

 well separated, of moderate size, subcylindrical with slightly con- 

 tracted apex. 



Several characters, particularly the presence of ampullae and the 

 poor chitinization of the posterior region of the ventral mouthparts 

 connect the present genus 4 with the genus Chariessa of the follow- 

 ing section. 



GALERUCLERUS OCULATUS Say (=CREGYA OCULATA Say). 



Hopkins U. S. No. 10081 J/; mature. Species reared ; cast skin and imago preserved. 



Total length of body, 9 mm. ; extreme width, 2 mm. ; extreme thick- 

 ness, about If mm.; anterior width of prothorax, about 1| mm. 

 Chitinous parts shiny. Head sienna brown; prothoracic shield usu- 

 ally anteriorly sienna brown, gradually darkening into sepia on the 

 main part of the shield, posteriorly lighter; in certain specimens, 

 however, the shield is entirely sepia ; mesothoracic dorsal plate sepia ; 

 metathoracic dorsal plate pale brown; delicately chitinized parts 

 pale yellowish ; membranous parts dorsally dark violet, with a whitish 

 pattern corresponding to the muscle attachments; above the heart a 



