32 Mr. J. S. Balj's descriptions of new genera 



Genus Mylassa, Stal. 



Ofvers. Vet. Ak. Forli. 1857, p. 60; Cryvtocejahalus, 



pars, SufFr. 



Corpus oblongum aut elongato-oblongum, parallelum, 

 convexum, piibe temii vestitum. Caput thoraci insertum ; 

 oculis ovatis, iiitiis vix sinuatis ; antennis filiformibus, 

 articulis quatuor ultimis $ interclum dilatatis. Thorax 

 convexus, margine postico noii serruiato, medio in lobum 

 validum, apice crassum, liberum, scntelli basin obtegente, 

 retrorsum producto. Scutellum subcordatum aut trigo- 

 natum, apice acutum. Elytra tboraci ^quilata, punc- 

 tato- striata, lobis epipleuralibus modice productis. Pedes 

 robusti, antici $ modice Qlowg&ii \ femo^^ibus (prfesertim 

 maris) incrassatis ; tibiis anticis rnaris ssepe apice incur- 

 vatisetincrassatis; unguiculis basi incrassatis. Prosternum 

 plerumque concavum, margine antico plerumque leviter 

 deflexo, margine postico obtuso aut obtuse angulato, 

 medio rarius obsolete sinuato ; lateribus maris s^epe spina 

 acuta armatis. 



This remarkable form, characterized by Dr. Stal in the 

 year 1857, was subsequently merged by Sufirian into Cryp- 

 tocephalus. The absence of teeth on the hinder m.argin 

 of the thorax (a character made use of by Dr. Chapuis to 

 divide the family into sections) requires its removal from 

 the position which Suffrian has assigned to it, and, taken 

 in conjunction with the raised thickened apex of the basal 

 thoracic lobe, the nearly entire eyes, and the pubescence 

 of the upper surface of the body, fully justifies its re-esta- 

 blishment as a genus. 



Genus Stegnocephala. 



Corpus breviter oblongum, postice paullo attenuatum, 

 valde convexum. Caput in thoracem insertum ; oculis 

 magnis, elongatis, apice plus minusve approximantibus, 

 intus late emarginatis; antennis dimidio corporis fere 

 eequalibus, interdum paullo brevioribus, articulis ultimis 

 septem, aut rarius articulis ultimis sex paullo compressis 

 et dilatatis. Thorax transversus, convexus, apice subcylin- 

 dricus, margine basali utrinque sinuato, angulis posticis 

 retrorsum productis, acutis; lobo basali brevi, vix producto, 

 late truncate, bis-emarginato. Scutellum trigonatum. 

 £'/?/^ra basi thoracis sequilata, postice paullo attenuata; 

 dorso convexa, circa scutelkmi elevata, punctato-striata ; 



