1881.] COLEOPTERA OF SOCOTRA. 471 



The following are descriptions of the new species : — 



1. Tetragonoderus flavovittatus, n. sp. 



Niger, nitidus ; antennis pedibusque piceis, thorace nitido IcEvi, 

 elytris cBnescentibus playis duabus Jlavis. 



Long. '6\ liii. 



Very close to T. quadrum, Olir., and of the same form and appear- 

 ance. The head and thorax, however, are black (with the mandibles 

 and the margins of the thorax slightly tinted with pitchy), very smooth, 

 and shining. The eyes are protected posteriorly by the head partly 

 surrounding them there. The thorax has the median channel well 

 marked ; and in the middle of the basal margin tliere are some longi- 

 tudinal striae. The elytra are slightly aeneous, shining, with the 

 striae well marked, the fourth and fifth strise rather distinctly punc- 

 tured in their basal half; the interstices are nearly flat ; the yellow 

 markings resemble those of T. quadrum, but consist of two patches 

 on each elytron, the basal one occupying the fourth, fifth, and sixth 

 interstices, the second one forming an undulating fascia commencing 

 on the third interstice and reaching to the eighth ; that portion of it 

 which is on the fifth interstice is more removed from the apex, and 

 nearly joins the other patch on the fourth interstice. The legs and 

 antennae are pale pitchy, the femora dark in their middle. 



2. Pachydema puncticeps, n. sp. 



Oblonga, convexa, nitida, pallide castanea ; capite piceo, crebre 

 punctata; clypeo reflexo, puree punctata ; thorace laxe subtiliter 

 punctata, medio longitudinaliter impresso ; elytris laxe punctu- 

 latis, lineis quatuor IcEvibus. 



Long. 10 lin. 



Very robust, convex, a little flattened on the back of the elytra, 

 subparallel at the sides. The head is rather strongly and very 

 thickly punctured, the punctures crowded near the eyes ; theclypeus 

 is concave above, sparingly punctured, very slightly sinuate in the 

 middle of the front margin, the margins reflexed. Thorax castane- 

 ous, one third broader than long, not very closely punctured, the 

 punctuation more distinct above than at the sides ; obliquely narrowed 

 in front of the middle, subparallel behind the middle (viewed from 

 above), with a veiy slight sinuosity, finely margined and fringed 

 with long fulvous hairs ; the posterior angles, viewed from above, 

 appear little greater than right angles (slightly rounded), but when 

 viewed laterally they are completely rounded off; the base is very 

 slightly oblique on each side, Scutellum sparingly punctured on 

 each side. Elytra much paler in colour than the thorax; at the 

 base a very little broader than the thorax, a little wider in the 

 middle, obtusely rounded at the apex ; finely ciliated on the margins ; 

 moderately finely and not very closely punctured ; each elytron has 

 four fine, narrow smooth lines (included between lines of close very 

 fine punctures), the first one very slightly raised. The pygidium is 

 very delicately and rather thickly punctured. The club of the 

 antennae is fuscous testaceous, not very long. The tarsi are very 



