BRENTHID^ AND THEIE HABITS. 301 



6. Ortchodes insignis, n. sp. (Plate XII. fig. 12.) 



Piceus, nitidus, capite pi'othoraceque impunctatis ; elytrls 

 costatis, sulcis regulariter grosse punctatis, signaturis flavis ad 

 basim, ultra medium at ad apicem. 



Pitchy red, shining; rostrum, autennse, and legs somewhat paler ; 

 head and thorax smooth and impunetate, elytral strise costate 

 and smooth ; interstices deeply impressed with single punctures, 

 the spaces intervening between each being smooth and equal to 

 that occuj)ied by the puncture. The 4th stria near the base has 

 a yellow mark covering a space equal to three punctures, the 5th 

 a basal spot equal to two punctures ; the 8th and 9th are yellow 

 before the middle ; a dorsal fascia occupies part of the 3rd, 4th, 

 5th, and an anteapical spot follows on 3rd and 9th. The ma- 

 culation scarcely ever varies, but sometimes the 5th basal spot 

 is absent. The c? has the rostrum in front of antennae canaliculate ; 

 $ smooth. Size variable, 3|-8| lines. 



This species, with some eastern congeners not yet described, 

 may ultimately require a new genus for its reception. It agrees 

 with 0. pictus, Pascoe, and lineolatus, Kirsch, as regards the head 

 and eyes, but the elytra are more like certain species o£ 

 Rhaphidorrhynchus. 



Common throughout Dai Nipon, including Sado. I do not 

 know much of its habits ; specimens were usually taken cravvling 

 over the bark of trees, or beaten, during the hottest part of 

 summer, off saplings ; and in the latter way I found it abundantly 

 in South Yezo in August. In this and no. 5 there is no special 

 modification in the structure of the legs ; but I am inclined to 

 believe that they often resort to, and hibernate or rest in, the 

 larger perforations of insects such as Longicornia, or under bark 

 of trees well loosened — spaces, that is, to which they can have easy 

 access without special adaptation, I found, at all events, the 

 allied genus Arrhenodes in Ceylon in this position, resting under 

 large pieces of bark which came off easily in the hand. The form 

 of Sollogaster ctenostomoides, Laeord., a very interesting species 

 of Brenthidse, seems to proclaim its predilection for narrow 

 galleries, as the elytra and abdomen below the humeral angle 

 deviate from the usual parallel line in these insects sufficiently 

 to receive the bulbiform apex of both the middle and posterior 

 femora. I have seen a specimen in Mr. Pascoe's collection ; and 

 would call the special attention of any one studying the habits 

 of this interesting group to it. 



LINN. JOUBN. — ZOOLOGY, VOL. XVII. 22 



