84 Rev. T. A. Marshall's monograph of 



laterally, clavate ; obliquely truncated at the apex, within which 

 are seen the short flattened valves of the anal forceps, and above 

 them the sheath of the sexual organ. Female unknown. Length, 

 1^ ; wings, 2^ lin. 



Antennae as long as the head, thorax, and 1st segment, stout, 

 filiform, 19-jointed. Head transverso-cubic, somewhat buccate 

 and wider than the thorax. The dilated cheeks and under side of 

 the head, together with the 1st abdominal suture, are rufous ; the 

 rest of the body intensely black and shining. 



M. Klugii, Euthe (Stett. Zeit., 1856, p. 290) corre- 

 sponds to this insect in many respects, but the frons and 

 mesothorax are punctato-rugulose ; the antennae of both 

 sexes, according to Eeinhard, are also 22-jointed, and 

 scarcely as long as the head and thorax. 



Described from two males taken in a wood near my 

 house at Nunton, Wilts. 



3. Microctonus xanthocephalus, n. s. 

 5 . Aterrimus, politus, capite antennarum scapo pedibnsquo 

 testaceis, stemmatico fusco. Tarsi omnes apice nigricantes. Alas 

 subfumato-hyalina}, squaniulis stramineis, stigmate testaceoundique 

 fusco cincto, nervis fuscis. Abdomen compressum segmento lo 

 sublineari postice vix latiore, tuberculis parurn conspicuis, terebra 

 breviter exserta, falcata, decurva. 



Very black, smooth and shining ; head, scape of the antenna 1 , 

 and legs, testaceous ; stemmaticum fuscous ; last joint of all the 

 tarsi blackish. Wings dull hyaline, squamulee stramineous, stigma 

 testaceous bordered all round with fuscous, nervures fuscous. 

 Abdomen compressed, 1st segment sublinear, hardly widened 

 posteriorly ; tubercles inconspicuous ; terebra short, falcate, de- 

 curved. Length, 2 ; wings, 3f lin. 



Antennae filiform, shorter than the body, 28-jointed. Meso- 

 thoracic sutures effaced. Metathorax short, triangularly excavated 

 behind. Hind coxae with a piceous basal spot. First abdominal 

 segment occupying more than \ of the whole length, linear and 

 depressed as far as the tubercles, condylus convex and very slightly 

 widened ; segments 2 — 3 extending nearly to the apex, the rest 

 retracted, annuliform. Abdomen after the 1st segment narrowly 

 elliptical, as viewed from above, as long as the head and thorax; 

 viewed laterally, clavate. 



Differs from all other British species in coloration, 

 superior size, and greater number of joints in the 

 antenna). 



