507 



length. Base of pronotum subacutely triangular. Metasternum 

 feebly tuberculate. First segment of anterior tarsi one-half longer 

 than the second. Sixth segment of abdomen feebly emarginate 

 beneath, a little swollen apically, connexival spines prolonged 

 scarcely beyond the apex of the abdomen. Elytra scarcely 

 reaching the apex of the abdomen. 



Length, 11.7 mill.; width, 2.4 rnill. 



Mysol (W.). — Higgins 1869, Coll. Van Volxem. 



Cinnamon; head immaculate, first and second antennal seg- 

 ments pale yellow, third and fourth darker. Pronotum with a 

 central and two latéral narrow and blackish lines, the former — 

 margined with pale yellow on each side — reaching to the base 

 of the pronotum, the latter reaching to the base of the médian lobe 

 of the pronotum ; posterior lobe margined with pale yellow (a 

 little reflexed), submargined with brownish. Elytra with darker 

 nervures. Apex of intermediate and posterior femora, apical 

 half of intermediate and posterior tibise, and ail the tarsi entirely 

 (black apical segment of anterior tarsi excepted) pale- yellow. 

 Venter obscure yellow. 



10. G. gracilicornis (Horvàth). — Nagasaki. 



11. G. fuscinervis (Berg). — Ecuador (E. Deville). 



12. G. thoracicus Schummel. — Cyprus, Larnaca (E. Des- 

 champs). 



13. G. marginatus Say. — Iowa, Tndependence (September). 



14. G. hyalinus Fabricius. — Cayenne (Pillault). 



15. G. nitidus (Mayr). —Bangkok (P. Robin). 



16. G.remigis Say.— Colorado, Colorado Springs, 6,000-7,000 ft. 

 (15/30 June 1896, H.-F. Wickham). 



17. G. antigone sp. n. 



Belongs to subgenus Aquarius Schell. (= Hygrotrechus Stâl). 



Forma aptera (one example also with very rudimentary ely- 

 tra) : 



Entire length of body one-half greater than length of interme- 

 diate fémur. 



Rostrum very short, not reaching the base of the prosternum ; 

 first segment of antennae 3 1/2 times as long as the second (rest 

 missing). Pronotum rugose, three times as long as wide, carinate 

 longitudinally, the carina arising at the anterior constriction and 

 continuing to the base, which is oval and narrowly reflexed. 



