266 Wisconsin Academy of Sciences, Arts and Letters. 



22. A Constriction dividing the thoracic part into a shorter anterior 



and a longer posterior portion - . Synemosyna Hentz. 



23. Sternum prolonged between coxae 1 25- 



24. Sternum not prolonged between coxae I Agorius Thor. 



25. Pedicle of the abdomen not visible from above. .'Damoetas Peckham^ 



26. Pedicle visible from above 27 



27. Sternum scarcely as wide as intermediate coxae; labium at least 



twice as long as wide Leptorchestes Thor. 



28. Sternum wider than intermediate coxae; labium as long as wide. 



Synageles F. S- 



29. Clypeus very lo sv in fron*", high below anterior lateral ejes, ex- 



tended and a little curved backward on the sides, forming an 

 acute angle below the eyes of the second row. . . .Ascyltns Karsch. 



30. Sides of clypeus forming no acute angle 31 



31. Body short, convex, beetle like; cephalic part not, or scarcely so 



long as thoracic 33 



32. Body not beetle like in form = 35 



33. Body strongly convex both longitudiaally and transversely; abdo- 



men high and widely truncated in front, where it is received 

 into an excavation of the cephalothorax; eyes of the second row 

 further from the dorsal than f . om the lateral eyes. 



Coccorchestes Thor. 



34. Anterior part of abdomen not overlapped by cephalothorax; eyes 



of second ro>v half way between dorsal and lateral eyes. 



Omoedus Thor. 



35. Cephalic part as long as, or longer than thoracic 37 



36. Cephalic part shorter than thoracic 61 



37. Eyes of the second row at least half as large as eyes of the third 



row Cocalus C. K. 



38. Eyes of second row less than one half as large as eyes of the third 



row 39 



39. Quadrangle of eyes longer than wide; tibia I greatly dilated. 



Chirothecia Tacz. 



40. Quadrangle as wide as, or wider than long; tibia I not dilated. ... 41 



41. Cephalic and thoracic parts equal 43 



42. Cephalic part longer than thc-acic 55 



43. Legs III and IV without spines BalliiS C. K. 



44. Spines oa the four pairs 45 



45. Third leg longer than fourth 47 



46. Third leg shorter than fourth 49 



' Damoetas^Scirtetes L. K., preoccupied. 



"^ Some of the species of Homalattus White resemble beetles, but in this 

 genus the cephalic part is longer than tV.e thor icic. 



