16 Mr. David Sharp on the 



30. Deinopsis modestus, n. sp. Nigro-fuscus, opacus, 

 dense sericeo-ijubesceiis, pedibus rufo-testaceis, antennis 

 fuscis ; basi, ore, palpisque testaceis. Long. 1^ lin. 



Much smaller than D. furcatus, about the size of 

 MyllcBna dubia. In form and structure presenting a 

 great resemblance to D. furcatus, but differing from it 

 as follows : — The antennte, palpi and legs are paler in 

 colour, and the front margin of the thorax behind the 

 head is distinctly yellow, and the joints of the antennse 

 are distinctly shorter. 



31. Tachmus mimulus, n. sip. Oblongus, nigro-piceus, 

 nitidus, antennarum basi, pedibus thoracisque limbo tes- 

 taceis ; el}i:ris thorace plus sesqui longioribus, nigro-piceis, 

 vitta intramarginali, apiceque dilutioribus. Long. 2 lin. 



Nota. — T. marqinello peraffinis, notis sexualibus tantum 

 differt. 



Mas, abdomine segmento 7° dorsali breviter 4-dentato, 

 dentibus intermediis magis prominulis : segmento 6" ventrali 

 late semicirculariter emarginato ; 7° breviter 4-dentato, 

 medio profunde emarginato. 



Fem., abdomine segmento 7° dorsali utrinque dente sat 

 elongato, medio lamina lata, apice truncata. 



This species, in size, colour, punctuation, and the struc- 

 ture of its antennae, most closely resembles T. marginellus ; 

 it is, however, a little broader, and very readily distinguished 

 by the sexual characters. In the male the structure of the 

 dorsal plate of the 7th segment is similar to that of marc/i- 

 nellus, but the four teeth are broader and shorter ; the 

 ventral plate of this segment is similar to that of margi- 

 nellus, but the ventral plate of the 6th segment is very 

 different ; it is furnished in the middle with a very broad 

 semicircular notch, which is furnished at the sides and 

 base with minute asperities ; in front of this notch the 

 segment is depressed, the depression being limited in front 

 by a roughened space. 



In the female the dorsal plate of the 7th segment has in 

 the middle a very broad plate, the extremity of which is 

 nearly truncate, being very obtusely acuminate in the 

 middle ; on each side of this is a rather stout tooth, pro- 

 jecting farther back than the extremity of the central 

 plate. 



Common. 



