12 Mr. Westwood's Observations on the Genus Derbe. 



parative paucity of the veins of the wings as compared with those of Plata, 

 Lystra, &c. ; 3rd, the unarmed posterior tibiae ; and 4th, the minute annular 

 form of the basal joint of the antennae, and the large size of the second joint. 

 I would have added to these the presence of ocelli, but we have seen that 

 these organs are apparently wanting in Thracia. Now we find these four cha- 

 racters equally strong in the genera Otiocerus and Anotia of Kirby, as well as 

 in some other insects which are described below, all of which I consequently 

 regard as subgenera of Derbe. 



Otiocerus. Kirb. (Cobax. Germar.) 

 appears indeed to be destitute of ocelli ; and the antennae, especially in the male- 

 are very anomalous, but in all other respects these insects arc true species of 

 Derbe. Mr. Kirby having given no representation of the rostrum, I have added 

 a figure of the entire head of the female of O. Degeeri, Kirb., in which sex the, 

 antennae are very short and bilobed (Tab. II. fig. 4 B). This species has the 

 anal angle of the fore-wings dilated into an angular projection (fig. 4 A), and 

 has been accordingly formed into a distinct genus by Dr. Burmeister under 

 he name of Hynms rosea ; but it will be seen, on comparing the veinin* of 

 the wings of this species with that of O. Coauebertii, Kirb. (of which I hL 

 also given an enlarged nVu re Tab II fi«r *\ a«. .1 

 veins u nim C f -i ♦• 1 g * )j that the arrangement of the 



veins is almost identical; so that it will be necessn™ *« , „ „ 



master's genus Hynms Y t0 ^^ D *' Um " 



<&z22ttzzi ::r e and '«*> * + - - 



subgenera, the median vein, ZZSTST T ^ " U "" 

 gin of the wing, and its aoical h™ u ' be ' n S nearer ^ Posterior mar- 



angle ; whi^ap SKK h ! h 0CCUPyh * ■* the «*°° of the ana. 

 - -est centra, i Jt^J^S^ S "^ ^ 

 « are from ■•» -uthem parts of North £££"* ' * *-? °' °^ 



Anotia. AYri. 

 differs from flerie in no material respect Like Or 



ginate, and the ocelli appear to be b Lte t ' " *" *" CyCS ema '- 



obsolete ; the antenna, having the second 



